I tested these last and they are VERY stiff. They took about 20 days to break and I put about 80 days on them total. Never had a problem w/boa but I could never quite get the fit completely dialed in. I'm more of a speedzone/traditional lace guy and I felt the boa wires didn't have the feel and flex I'm accustomed to. Def a good boot if you're looking for a stiff, techie, freeride boot. I ride Rome Targa bindings and I never had any problem w/boot height. The Targa/Cirro combo is one responsive set up!