I've been cutting my husband's hair for 18 years, with a Wahl. I purchased a new one, 23-Piece, almost a year ago, and while it does cut hair pretty well and all the accessories are there and nicely marked, due to the noise I am giving up on it. It never was very quiet, but now some attachments cause it to make such a loud noise that it's unbearable. Yes we have tweaked with the screw on the side but to no use.