The audio listening is heavy (Sony obviously) and anti-noise earphones are perfect (tested in the bus and metro).
Internet browsing is fluid and fast (4G)
I tried a few games and it works very well; no slowdown.
Only small problem: the battery, intensive use should be recharged every day.
I bought via Orange (mobile change program) so it cost me less than 100 euros. For that price is a killer !!
I highly recommend!
(In addition it can go under water, beautiful pictures in perspective)