Ive owned the SGH600 for more than a year now, and I simply love this tiny portal of communication. Its lightweight(95gms) and has enough talktime to take care of all your needs. Standby time is just great. Im not a very heavy user (probably 15 minutes a day) and find that I need to charge it once in two days and that too inspite of the fact that I NEVER switch it off.
I have read other reviews which say that its reception is bad. Admitted that its reception is a little worse than other phones in its category (10% less is what my tech guru on cellphones informs me) but that would matter if you frequent places which fall in the signal shadow belt. I think you have your service provider to blame for that and not your phone.
The voice dialling is one feature ive gotten addicted to. I do agree that sometimes it fails(like when you are in a noisy zone or uve got a bad throat) but when it does work(which is most of the time) it has saved you a lot of trouble and headaches. The graphics are neat too. Using sms is easy. I specially like the menu structure which is very easy to use, especially the softkeys.
small and light as it is, it is also a tough phone. I have dropped it(unintentionally of course) several times and each time, all I needed to do was to insert the battery properly and switch it on again without facing any problems whatsoever. I did manage to get it wet too a couple of times, and I was careful to disconnect the battery as soon as it happened. However the phone did not give me any trouble.
All in all a great phone.