The UR blades do leave a little bit of fuzzies on plywood but almost none on hardwood. As for the cost of the blades vs the sanding time, I will spend the extra $ or two on the blades because of how much better the finished produce looks. All blades have a purpose, but some people can get acceptable use for other projects. To me the blades are cheap. If I use 12 blades instead of 6 on a project the cost is about $1.50. That's cheaper than buying a soda or tea at a restaurant.