You've been having good luck with those?
Last batch I bought a few months ago, they seemed to evaporate pretty quickly. The flap discs are OK but the cost/benefit of the cutoff wheels drove me back to the Dewalt XP high-performance ones from Lowes.
I might be a 'super-user' for cutoff wheels though...every bracket/tab/fabbed piece on my engine mounts, both axles, coilover towers, etc. was chopped out of a 4x4 piece of 3/16" plate using my Milwaukee 4.5" angle grinder and cutoff wheels.
Here's what's left. I pretty much retired this piece.
For $35k you can do a Cobra kit car. $20.7k for the kit, plus motor, rear end, tires/wheels, paint, and battery. I want to do this in the not-to-distant future. And I'll be the asshole who puts a Corvette motor in it, and drives it as much as friggin possible. 11-second 1/4's and 25+ MPG's? Yes please.