I brought my Sony Xperia sl in Feb 2013, it’s almost 3 years, still in working condition except some problems. Before telling you the problems, Let me tell you that I have used my phone very rough. Now my camera doesn’t work, neither front, back nor flash, maybe some connections have loosen up, you can easily find sights of wear and tear nd I think battery have depleted a bit, but I still get 2.5 hours of screen on time with full charge.
Best part about phone is
Never took my phone to service center for any problem in 3 years.
Buttons still work perfectly fine, seems as new.