In reply to AlanLittle:
I've climbed 7b sport and 7a boulder in the edge shoes. They fit similar to a katana/miura. The heel is a little baggy and for a while the stitching on the heel rubbed quite a bit.
The rubber is obviously good, but the build quality isn't as high, so the sole split from the rand slightly (which has happened to my last two miuras anyway) quite quickly (within a few days on limestone). However I've had them nearly five months now and they are still going fairly well.