As much as I am a loyal Apple products for everything tablet, ipod etc. for telephony I have always remained faithful to Sony. Here it is more comfortable level M2 surface than a conventional iphone and disproportionate level price. Disk space is sufficient but can be boosted with a Micro SD. The interface is logical and easy to access preset to suit every taste. I do not play on this support casual gaming style but I saw that there is no lag and a very good response; However, I listen to a lot of music and sometimes for portable listening I allow myself to let the tracks scroll on the Xperia, the sound is really stunning. I own this phone from the month of October last and autonomy is perfect like the datasheet. A pleasure to use even for the most refractory of mobile telephony.