When I bought this product the andriod OS is jelly bean 4.1 then after updating jelly bean version 4.3 my cell phone is heated whenever I used after updating the my sony xperia M,
GUI is good, camera result improved, new updates for album, music, movies etc.
main features is like NFC, screen mirrioring, all xperia connectivity.
overall it was a nice experience.im waiting for sony xperia M andriod update kitkat or Lolipop