1. Elegant full-screen use

Harking back yet again to Steve Jobs' claim at the iPhone's launch that existing designs used 'too much plastic', referring to the waste of frontal area by using a d-pad or qwerty thumb keyboard, it's clear that, real world misgivings aside, there is a lot to be said for a screen that occupies the maximum possible area, with control elements displayed as needed, according to whether you're entering text, playing a game, browsing the web or watching a video, etc. The Nokia 5800 is firmly in this camp and pulls off the trick remarkably well, considering that its firmware isn't very mature yet - it can only improve further in this regard.

2. Decent battery

With many recent Nokia smartphone designs blighted by an underspecified battery (cough, N82, N95, N96, E75), it's great to have 1320 mAh under the hood. Admittedly with the display set on maximum brightness and with a lot of video podcast/iPlayer watching [maybe that's just me!], the battery still isn't going to last for days, but for average phone/music/text use the 5800 should comfortably last the distance.

3. Carl Zeiss lens

Again, a welcome design choice here. For such a 'budget' smartphone (it's not even in the Nseries range), to have decent optics makes a significant difference.  Reviews which slam the 5800 XpressMusic as having a 'weak' camera haven't taken the time to understand why shots sometimes go wrong. The problem is that the aperture and sensor sizes are small (probably dictated by the build cost and by the amount of depth allowed in the casing), so photos and videos taken indoors and in the evening are very disappointing, with huge amounts of digital noise. BUT. Take photos and videos outdoors and especially in sunlight, and the 5800's camera with those Carl Zeiss optics can produce results that rival those from the all conquering N95. See here for proof.

4. Media key

This feature took a while to grow on me. It's no secret that I wasn't fond of the 'multimedia' key on the N95, N82 and just about every Nseries phone since - the carousel menu took just too many keypresses to do anything useful and it was always easier to use the standard S60 menu (I see Nokia has started to drop this key from newer models like the N86 8MP, so maybe they've finally heeded my words). The 5800 XpressMusic doesn't have any hardware music controls, so something's obviously needed though - the touch 'media' key fills the function neatly by helping you get quickly to Music player in two taps from anywhere in the 5800's interface. A long press on the 'key' to go straight to Music Player would have been even nicer - maybe in the next firmware, Nokia?

5. Keyguard

Most PDAs since the dawn of time have had an on/off button (though of course off isn't actually 'off'), the idea obviously being that you don't want the screen and keys getting pressed in your pocket. Phones have an equivalent that normally involves a two keypress system (e.g. left function and then *), but the modern trend in Nokia's most recent devices of having a keyguard 'toggle' is much, much easier to use and much easier to remember. Another good design choice on the 5800, Nokia.

6. Haptic feedback

With phones usually sporting a vibrator for alerting you when in 'silent' mode, it was natural that this system would be used when touch finally hit phones and Nokia has implemented a generic 'wobble the phone when a screen tap is registered' system. It's not unique to the 5800 XpressMusic but it's good to see here - on the AAS team, Rafe and I are big fans of it [Ewan's not so sure and has turned it off!] When typing on the full-screen qwerty keyboard, having mechanical ('haptic') feedback is an essential step in making sure that 'key' presses are all registered properly. Yes, the 5800 could still do with a truck load of iPhone-style spelling and writing aids, but we'll again have to leave this one for future firmware...

7. Mature OS and subsystems

Now, don't confuse this with me saying that "the 5800's firmware is immature" - it is, very much so, and there are many firmware tweaks and bug-fixes needed before the 5800 can be pronounced to be 'finished'. However, the fact that it runs S60 5th Edition means that it's building on every previous version, every previous Feature Pack, every previous codec and library addition. This isn't immediately apparent until you start comparing a S60 5th Edition phone with something like the Apple iPhone or Palm Pre or the Android-powered G1. In each case, these much newer 'built recently' platforms appear to be 'all there' (they certainly have lots of eye candy) but when you need something detailed, such as adding a phone number from your call log to a specific field in an existing contact or sending a Note to someone else's phone using Bluetooth (to pick just two everyday examples that can't be done on some newer competitors) you'll find that S60 5th Edition is now very complete indeed. Add in the most up to date audio and video codecs so that almost any file type can be handled and the real time maturity of Symbian OS in handling multiple data connections, applications and interruptions seamlessly, and you end up with a phone with a rock solid base - even if the top soil is still in motion a little(!)

PS. As a postscript to this point, the 5800 has been widely criticised as Nokia simply slapping a touch layer on the existing 'outdated' S60 interface. This is, to some extent what Nokia has done (plus a lot more under the hood), but my argument (and theirs) would be that it's better to leverage and improve a phone interface that's already in use by well over 200 million users across the world than to throw it all out and start again. In this way, the 5800 XpressMusic feels instantly familiar when in use - it's no direct iPhone or Palm Pre competitor in the UI stakes, but there's more to a great PDA or phone than a pretty interface.

8. Wi-Fi, TV-out and GPS

At this price level you really wouldn't expect Wi-Fi and TV out and GPS, even in 2009 - that's a lot of power user functions to shoehorn in. All very welcome indeed though - I know I for one couldn't live without Wi-Fi (video podcast downloading, mainly!) and I'd be extremely loathe to return to the days of the separate Bluetooth GPS. TV out isn't used that often, but is handy to keep for tech demos and immediate display of your snaps. With the likes of Nokia's E63 omitting a GPS, ostensibly for cost reasons, it's good to see that the 5800 XpressMusic's product manager had his head screwed on straight when working out the spec level that Nokia could afford in their 'Tube'.

9. Inclusion of an 8GB microSD in the box

With the already generous box bundle (stand, TV out cable, case, etc.) it was another pleasant surprise to see a fullish complement of 8GB of expansion disk space available from the very beginning. Even with my power user needs, I've still not filled my 8GB card yet, so many 5800 owners won't even need to go shopping - ever. Again, kudos to Nokia for going the extra mile.

10. Loud loudspeakers

I've already mentioned this in the main review, but the 5800 boasts some very impressive stereo speakers. When listening to podcasts, the 5800's sound output easily fills the kitchen or wherever I'm toiling, helping to make the chores enjoyable.