I swear to god the phone is about to melt down when this thing is done. It must be working every CPU and GPU at 101%.
I mostly use the phone for GPS and reading email. i'd reply to emails as well, but too painful. Often i have to use it to comunicate or type things. it's not a hardcore usage. i don't even use SSH much on it. It took me 2 years to find out that car chargers are crippled by apple deals and did not charge my phone correctly, so using it as GPS plugged in, i could only get 6h of use. After a little soldering to get a proper car charger, i get a little more, but the phone burns hot.
wife and everyone at work has the samsung ones (s3, s4 and note2) the note 2 i simply can't use for 2 min without pressing the back button accidentally! my nexus one is the opposite. i can't activate the damn buttons one the first try! ever! some people even try and try and just handle me back so i can press the soft button for them (have to press with the 'meaty' part of the finger for it to work).
anyway, i will probably set for the S4 active (with lower camera, cpu and much inferior screen, but at least slightly rugged and has actual buttons)... because a GSM android phone with a qwerty keyboard is non-existent.
i hold my breath at launch for the backflip. excellent keyboard! until i realized it had the worst cpu ever, and as of today, it only runs android 1.5
for good historic phones i've used with good keyboard, #1 was a nokia 6820 http://www.gsmarena.com/nokia_6820-565.php (maybe same as e70)