I've heard the bad and good reviews about this phone, but i got it anyway
1 - because of the price - alot cheaper than the s version 2 - the compact size of the phone and screen size (the xperia s seems abit big for my small hands) 3 - i actually like the end caps
if you are a light user and not bothered about how much (little memory it has), apps hardily use any memory as it is, they are only MB's in size, for movies you can use a usb adapter and add a memory stick to it and have your movies on there rather than loading loads of movies on your phone.
i like the smoothness of the phone itself, very quick at flicking through the settings, the pages etc, picture quality it really good, very bright screen, the sound quality is really good with both the loud speakers and with headphones in.
The end caps are good, i like the pink one has it looks good! (alot of people dont like the pink end cap) but it does come with a black one.
the battery lasts quite abit aswell, i had wifi and data switched on for two days and playing with apps aswel and only used half of the battery. but it does depends of what you are doing and how long you are using the phone.
all in all its a good little phone for the price of it and for what i use it for!