I had a go of the North WAM 6' 0" yesterday in shoulder high surf 18-20kn cross/onshore and loved it. It's a really forgiving board that turns on a dime. I'm 85kg and quite aggressive in my turns and never managed to loose an edge. I found also the rail never caught once on the steeper drops.
I usually ride a 6'0" Converse and found the WAM a heavier board however easier to turn and fantastic on a steep face. It feels and looks like a really good quality build.
I don't think you can go wrong with this one.

Hope this helps
Cheers
Simon