They have the movable drive on them(on the A's) that change the fell of the pedals. If you have them set all the way to the bacl, they feel like a strap drive, so they are really smooth but not as fast or powerful feeling, but if you move it all the way forward, it's got tons of power.
My thinking is that most of the chaindrive players who didn't like them, probably tried them with it set all the way to the back.
The reason I say that is because I play with it all the way back (and they feel like a strap, or really like a Ludwig Speedking), and let a friend who loves the chandriven pedals (He's been a DW pedal user for over 20 years) try them, and I flipped the drive set up forward for him and he loved them.
The whole key to them being faster is the direct drive link, because it acts like one piece. I used Chaindrive pedals for years (first it was a set of DW's, the Pearl p880's, and finally Pearl P950's before switching to the Axis pedals) but prior to that I used Slingerland Tempo Kings - which was a strap drive that Slingerland no longer made. So I never quite got used to the feel of the chaindrivern pedals.
Usually, the best pedal around - is the one you are used to. It took me a little while to adjust to the Axis pedals, but as I got used to them, my kicking speed increased exponentially.
It's one of the few products that I have a hard time seeing anyone really making a better version.
Except, of course me. LOL! I've got a footpedal design in the works. Well, technically, it's already designed - I just need to come up with the money to build the prototype. I have a friend who is a machinist and he's going to help me work out the kinks, and if I can get this thing going, we're going to go into business together.
So, he'll get part of the profits, and I'll get trained in how to use the CNC machines to make the things - so that works for me.
Tim