I hung on to my old v60i in the hope that Motorola would fix their user interface, this one is substantially different, but the bad features of the v60i remain. The side buttons.As of 5/22/08 I'm about ready to hurl this from the roof. The UI is just too inconvenient. I've also had to replace the battery once.6/13/08 Enough already! I replaced it with a Nokia E51. On the E51 the side buttons are not too sensitive, they require deliberate use, and all buttons are automatically locked after a timeout period anyway. The E51 is nearly twice the price now but 10 times the phone (GSM quad band, WCDMA dual band, 802.11g an FM radio and god knows what else that I haven't found yet). I have temporarily given the KRZR to my significant other, but I'll be replacing that and the daughter's phones with Nokia phones when we change the plan to use the E51's data capabilities; why would I inflict on her what I wasn't happy with myself?Let's do the good first: The voice quality in both directions is good, the talk time is good and the standby time is good enough that I am surprised when it needs recharging. I use it quite a lot and that still only seems to be twice a week. The ring tones are the usual selection but the maximum volume is considerably higher than in my old phone. Signal handling is much better, it holds on to calls that AT&T; could previously be relied on to drop, but there are still issues where it fails to roam to the next cell, though I strongly suspect that is due to lame network software rather than the phone (symptoms are that after a dropped call with no signal the signal strength immediately maxes out). For someone who travels to Europe the quad band GSM is indispensable, I keep a spare SIM for UK visits because it gives me calls to the US for about 1/10th of the cost of allowing AT&T; to roam to Europe. The music player is fine, but you are going to have to either buy bluetooth headphones, which you can't use on a plane, or buy the USB adapter which should have been included for the trivial cost in such an expensive phone. It makes an excellent alarm clock and is loud as hell.The not so good: The iTap text entry is slow and not as good as the old version, whatever that was called. I guess I'll eventually get used to iTap, but the old predictive text had some advantages.The Ugly: the joker who came up with these side buttons that can't be disabled should be fired. It's the easiest thing in the world to brush against the phone and fire up the crummy voice entry (below) or, with a bit more of a rubbing motion, switch the ringer from one more to another. So you can silence the phone and drop it in your pocket only to find it ringing in the middle of a movie. Or you eventually notice nobody is talking to you and check the phone only to find you have a couple of missed calls and the phone has been set to silent. Somehow. Then there's the voice entry, the best you could say is that it's not good. If you brush against the voice button it thinks about it for a good while and then some awful woman say "say a command". Now you have to try and convince it to call someone based on the phone's attempt at pronouncing the name you used in the phone book. Since I work with a load of Indians and Chinese that's about as much use as a chocolate fireguard. It was much more useful to be able to program the nicknames.But would I buy it again? Yes. There aren't many neat phones like this and if there's another one with quad band GSM too I didn't find it.But if someone comes out with a quad band GSM phone with good signal handling and no side buttons you'll see my KRZR on Ebay the next day.