Yeah, I have bought several bundles of those microfiber towels. They are NOT all created equal, however. You can feel the difference in them depending on where they came from. And I learned a valuable lesson the other day:
Don't drop those suckers on the ground! 
BTW, Sam's Club has them about the cheapest price I have found, but I don't think the quality is as good as some others I have bought.
Oh, and I've heard conflicting opinions about this, but should you cut off the edges? I've heard they CAN cause scratches......