Adrian44, I've got the alloy-framed P-01, hands down it is my #1 EDC, replacing many other pistols on its climb to the top! I cannot comment on the 75 Compact except that you won't have a rail on it and it will be slightly heavier in weight due to it's steel frame.
Anyway, I have no problem concealing my P-01 (or any pistol for that matter) IWB while wearing shorts and a t-shirt pretty much year round.
In my book I am going to say that it is very reliable, as it has flawlessly fed 550 rounds with no cleaning other than the initial degreasing out of the box.
It's accuracy will be determined by your abilities, but nonetheless it will put the rounds where you are aiming. It is a very accurate pistol, to say the least.
My take on its build quality is excellent. Some people gripe about the out of sight, out of mind interior finish on CZ's (or rather lack thereof), but it in no way, shape, or form effects the weapon's functionality.
Just be mindful that until you start breaking the trigger in with lots of shooting and dry firing, it is going to be a little rough at first, especially in DA. But then it will smooth out very nicely.
Good luck!