Some thoughts after a week and a half of use.:
For me its one of the best 'phones' I have ever had, it does so much and as long as you keep it charged then this phone with use has few limitations. I was initially excited by the phone and loved it the first few days then got really annoyed with a few issues (I will explain in a bit) but I have accepted them now and am v happy with it. Its more than a phone anyway its a personal communicator or even as Nokia say a 'mobile computer'. Now during my average day I get all my emails instantly, I can go on MSN, make international calls for free, and sometimes use google maps to find my way - all in all its well worth the extra cost.
Gimmick/Negatives
Double slider - the 2nd sliding music functions are a complete waste of time and a total gimmick in my eyes. Each time you slide it out you have to wait for the 3d menu to load up, then you can use the buttons, why not just use the existing buttons on the side of the phone like SE? I use the built in remote control to change tracks anyway so never touch the double slide.
3d Menu - What is the point of this!? Yes it looks cool, but you have to wait a couple of seconds for it to load up which makes it pointless. When you use the phone you want it to work instantly. This feature is merely to show off the phoen to friends or for Nokia to sell the phone.
Battery life - Its weakest point if only it wasnt for this! With a better battery this phone would almost be perfect. I am guessing that Nokia felt some pressure from the 'RAZR effect' and wanted to keep the phone thinner hence, a smaller battery and not impressive battery time. In some defence of Nokia, if you use this just as a 'phone' and not all the extra functions the battery life isnt too bad conversly you dont buy this phone just to use as a phone!
Positives
GPS - Last week this would have gone in the Gimmick category but I have come to work with it and understand that it doesnt work instantaneously (even though that would be nice) When its working it is fantastic - especially when you combine it with google maps - its amazing to see your location moving along on a satellite photo!
Camera - Not totally blown away by this as I was expecting incredible quality for 5mps, nevertheless it does take rather good pictures. The video is excellent (apart from some screen 'tearing' if you pan around quickly).
Email - Really great, now I get emails from all of my email accounts and an indication when a new email comes in, this is a strong positive of the phone for me.
VOIP - Really impressed with this - now I have fee international calls another killer app for this phone. (PS I used Truphone - free International calls and landline calls in the UK until the end of June)
3.5mm jack - At last!
There are more things but i am feeling a little lazy now so that will do! An unlimited data plan is almost essential for this phone, only then you can use all its features to the max.