I read up on this lock and a lot of reviews talked about it being too small, not fitting and keys breaking. To be honest I have not had any of those problems. I have not had any trouble locking my bike to stands and poles although it is a little fiddly and there is a technique but once you figure it out it is no problem apart from the shackle scratching the frame a bit, a bit of tape on the frame solves this.
As for fitting the bracket to the frame of the bike, again I do not know what all the fuss is about, yes it does not fit perfectly inside the frame but if you angle the bracket out a little it fits just fine. Personally I have the bracket on the top bar of the frame with the shackle pointing backwards along side the rear wheel and it is just fine. If in doubt just look at someone else with a d-lock and see how they managed it.
The breaking key issue was my main concern obviously but again a little research solved that question, I just asked someone in a bike shop who owns a Kryptonite lock about keys breaking and they said keys only really break because they stick a little when inserting and people force the key when it is not fully inserted. So as long as you make sure the key is inserted all the way in before turning you will be fine, and do not FORCE the key anything you force will break. If it sticks just play with it a bit and you will not have to get an angle grinder to cut the lock!
Hope this helps