Aesthetic: I've had mine for about 6 months and still love the 'like an i-phone 4 but not' look which attracted me in the first place (although it's lighter than a i-phone 4), I'm sure I'm not the only one to have commented on the similarity! It looks good, feels good and it's not too big to fit in a pocket and not too heavy that it slips to the bottom of a bag.

Speed and performance: This is where the main problems start. For the first few months it kept switching itself on and off and sometimes the screen would blackout and freeze. It would then beome impossible to switch off or back on and the battery had to be removed and put back before I could use it again. This was very, very annoying for a while - as it always seemed to happen just when I needed to use it. I read online that one possiblity for this problem was that the wifi would somehow affect the phone, so I started switching the wifi off when it wasn't in use and this seems to have worked since (fingers crossed).
It's great for games, surfing the net, photos and videos, but not ideal for the thing that is most important in a phone - making and taking phone calls! It has a habit of cutting off calls for no apparent reason and I've grown to hate the beep that means you've just been cut off. If you're thinking of buying one, it may be worth checking to see if they've ironed out these annoyances. My boyfriend got one for Christmas and his seems to work a bit better than mine - he certainly hasn't had the screen freeze or the cutting calls or having the take the battery out problems I have. The only annoying about his is that sometimes it cuts to Emergency Calls only mode - even when in a good signal area. This can be quickly resolved by putting it into flight mode and then taking it off again.

I had avoided an android or any type of touch screen for years - mainly as I didn't think I'd get on with the tiny QWERTY keyboard which everyone seems to have to tap away on on some phones. The great thing about this phone is that you can chose to have the normal numerical key pad, except as a touch screen - and it's a good size too!

It might seem that I've moaned a bit about this phone, but I really do like it and now wonder why I resisted an android for so long. If I could give Samsung one little piece of advice it would be this: SEND OUT A PROPER INSTRUCTION MANUAL WITH THE PHONE!!! The little start up guide is useless and doesn't tell you anything about how to work your phone. I had to use trial and error and a lot of internet searches to really get going with mine. If it wasn't for the fact that I had one, my boyfriend would have really struggled with his. I searched online for proper manuals - and they seem to be so rare that one person was charging £45 for one on ebay!