I've been using Atomic Blades for all of my extensive 20 dive career.
Last weekend, I bought a dry suit and a set of Hollis F-1s. I spent a bit over 2 hours in the pool on Sunday using the F-1s.
I mention the F-1s because they have a good reputation around here and I don't see much on the Atomic Blades. My opinion after my little bit of experience is that the Atomic Blades are very good fins. And they are neutrally buoyant, so a good choice for warm water. Comparing them to the F-1s, it seemed like the Blades gave a bit more propulsion from flutter kicks, about the same as the F-1s for frog kicks and helicopter kicks, and the F-1s seem to work better for back kicks.
I hope that helps.