Was looking for some good Locking Tuners and some luthier friends suggested Gotoh so I decided to try them out. Only installed them a couple of months after I received them because I was busy, installation was easy and they felt good quality, but the D string tuner skips a bit and jumps like it has a gear problem. It's not the biggest of deals for me because it's not on one of my main guitars, but it's a bit bothersome especially for the price...