I got the Hammer in Crystal plastic on a bit of a whim, and I gotta say I really dig it. First off, the numbers aren't accurate to me. Its much faster than a 2 speed, and not as OS as Yikun says. The rim feels almost exactly like the Zone/Ringer GT, which I believe Discraft ended up sourcing out to TSA for mold branding. So it has a Zone like rim (4 speed) with a plateaued leading edge that does slow the disc down a bit, but not a lot. Im not sure what purpose the second raised edge has. It is not noticeable at all on backhand throws. I feel it on forehand throws, however it doesnt seem to affect my grip or the flight of the disc as far as I can tell. All in all its very comfortable in the hand. The disc is definitely low glide, however it is a good deal straighter than an average premium plastic Zone. On backhand throws it will have a pronounced fade but by no means dumpy. It doesnt handle my forehand OAT as well as a Zone does, but if you hit it smooth on a forehand it will fly dead straight, not really wanting to turn or fade. It could be workhorse approach disc for my game and I imagine many others as well.