"You never regret buying the best quality." I dont know who first said it but aint it the truth? Regardless of which cutting tools you buy, keeping them sharp is key to getting good results. Make sure you have a case or at least a piece of wood drilled for them to stand securely in. If you get a nick or a dull edge find a local machinist or service to sharpen them. An imbalanced bit is dangerous! Dont stand your router on the cutting edge of your bits. It may be common sense but it bears repeating. Safety first!