Have the I9001 now two weeks'm really excited by the device. For this price you can not go absolutely wrong. Easy operation, fluid and stable. There are no crashes. The smooth back might have to complain about but like its predecessor I9000 one knows in advance what you are buying. At first I had to get used to it but now I'm wonderfully clear with around quite smooth housing. Top display (hardly contrast to S2). Desirable an update to Gingerbread 2.3.4 would (only 2.3.3 available or already installed). The battery lasts me about 2-2.5 days (although I constantly have to Syncho and from and to the WLAN). I had so far with anyone yet smartphone. The reception is much better than with other devices, I have with me in the apartment better reception than for example with the Samsung Ace, Samsung Wave and especially with many HTC devices where no receipt was there. Call quality is also very good. Since you can not complain really. So from me a clear recommendation !!