Overall I'm impressed with these bits. The cost far exceeds expectations. Based on some other reviews, I was expecting below average performance from these. However, after 3 works I see great results and will continue to use them. 10 bits at this price is tremendous value. Update: After some time with these bits, I've found that they have a chip evacuation problem, especially when cutting hardwoods. When cutting a 5mm deep V-channel in maple material, the resulting channel will become severely clogged with dust/shavings. Adding an extra finishing pass helps a little, but it still takes a lot of manual work to remove all the shavings from the cut. I still recommend these bits as they are great for the price but be aware that this may require more cleaning work than expected. when cutting some materials.