In reply to Skip:
I bought a pair from rock and run on sale recently. I've a wide forefoot but thin heels. They fit me really well in my street shoe size. They're not too aggressive but aren't flat either, there's some flexibility here with the lacing tightness.
The "square" shape at the toe others have mentioned is correct. There's a flat edge to the inner of the big toe that allows for edging nicely. They can be difficult to put the toe in small pocket holds.
Any particular questions I'm happy to help. Overall I'm really pleased with them.