Btw the lock/power button is quite hard to press since you'll need some mental focus to do it.

So I'm using this app: https://market.android.com/details?id=com.k...bm9mZmxvY2siXQ..

Awesome app and can help reduce wear on the lock/power button plus it's easier this way.

haha.
seems like u are here for flaming us as arc/arc s user.
ok let me clarify this.
xperia arc/arc s has the most stunning design.
but it lack of processor speed.
FYI, arc/arc s is CAMERA phone.
Ok. I repeat. It is CAMERA phone.
thats mean, SE make an arc/arc s focused more on CAMERA.
and that processor speed is juz enough to process the image and also HD video.
it is not as good as Nokia N8 but it is the best among android phone.
even if u compared to other android phone, arc/arc s still the winner in term of camera quality.
the processor speed is juz enough to stream ur youtube video, play high end game, and other application.
if u say arc/arc s face a lag while navigate through the UI, then u hav to know that it is normal.
even if u using dual core galaxy s2, u will face a lil of lag.
arc/arc s is said to be outdated juz because it processor is still single core while other manufacturer making a dual core phone.
for me, even it is single core, but it run smooth for me right now.
throw any game even tegra optimized game to arc/arc s, sure it will handle perfectly.
once again i want u to know that, arc/arc s is CAMERA phone.
so u've got the point why it lack in term of processor speed.