Absolutely the best! The owner is completely up front, and informed me he would not attempt to restore my Pioneer SX-850 stereo receiver if it could not be properly done.. Not only was my receiver restored, but my KLH speakers were, also, restored to their original quality. My entire system sounds far better than when purchased more than 35 years ago! He also provided excellent advice for purchase, with caveats, of current electronics. Again, if you want the best, deal with this business!!!!