Ok, My case arrived today, and just went for a walk with it tracking (cardiotrainer rules) to get a feel of it in my pocket etc. I agree totally with what's been said; this case is awesome!
It does add a bit more bulk which is noticeable at first but feels normal quickly. It doesn't make the phone uncomfortable in my hand or pocket, it's not a problem for me. And you can feel how much protection the phone is getting, this is solid. I love the 2 layer approach from a design point of view - the outer hard plastic spreads out the shock and then the inner silicone absorbs it. It also means that it's not sticky in your hand or pocket, the hard plastic shell feels nice in the hand actually, has a slight texture to it.
My only complaint is entirely my fault - I messed up the installation of the screen protector, I didn't get it on in quite the right location when I put it down and then tried to pull it up to move it, and now the bottom isn't sticking down (the bit below the keys) - looks bad but it's not on the screen so not a big issue. Might try to trim that bit off (and leave the HTC logo exposed, the horror!) or just get another screen protector.
My sister also has a desire HD so when she gets back I'll take some shots comparing her phone without a case to mine, give a better idea of how much bulk is added.
Oh and the volume rocker and power button are fine, they look like they stick out a lot in the photos but in reality it's pretty minimal. They aren't the easiest to press and the response is ok but not great - but considering what the button below it is like I think they have done a great job, it's certainly an improvement
