ive only had one issue on my xperia s with ics and thats only minor(the data connection cut out after extended use and you have reset to get it back). Otherwise its more stable than gingerbread i haven't had a app force close yet and im running 80 apps on it. The battery life is now also very acceptable for a smartphone considering the display its got.
Remarkable! after reading the literally hundreds of posts of the absolute horror people are experiencing with ICS upgrade, myself included. Hope it stays that way for you.
im one of the lucky ones i suppose. The thing that really annoys me is the pc companion, its useless no matter how you try and connect it doesn't work. sony advertised the phone as connecting to everything seemlessly yet it really does not acheive this.
I don't want to loose my warranty, method which you have mentioned ll void my warranty.. my phone is just 2months old and reading up the issues put up the Xperians.
now we cant roll back to previous version w/o risk.. thats really a weird thing na.. 