For the same price as HSS bits I wasn't expecting much but I was pleasantly surprised. Decent quality, sharp enough out of the box and even the case was good. I used four bits the day I got them and they worked really well. Very little spout and sharp enough to deal with dense spruce and pine. Haven't tried them on hardwood yet. The waves are a little short, but 99% of the time this is a very minor issue. No real complaints, but not hardwood back then, and I haven't tried extensions.