I'm no pro, but I love this 2' flexible block. This is the first long board I've used that has a hard sanding surface, but is flexible enough to conform to body curves. I'm using it on my 1971 Cutlass S that I just put a new roof skin and A-Pillars on. I think it's real advantage is the hard, but flexible acrylic surface. The vast majority of the panels on this A-body are compound curves. I have a hard longboard, but it cannot curve, and it's got thin rubber padding on it. The foam type long boards are easy to make waves because the surface iteslf can depress in over bumps. It's not going to replace the other long boards, but I sure am choosing this new one a lot. I could immediately see that it was getting the surface flatter because of the sanding pattern. If you zoom into the attached photos, you can see the scuffed and un-scuffed areas that showed up immediately. This whole area was blocked down already withy foam longboards.