These are very well made and have never let me down. Sure, with the locking thumb wheel on the back they weigh a little more than some other locking tuners, but it's not anything that affects neck dive or anything detrimental. String changes are super fast and tuning stability is improved -even if your guitar doesn't have a vibrato bridge of any kind. The tuner bushing / washers are not flat. Instead they have a collar / lip that goes down into the tuner post mounting hole, so you may want to check on that if you just wanted a flat bushing that sits flat on your headstock.