Very ergonomic: makes tuning much easier and almost pleasurable!
I have now fitted these to all my guitars and only wish they made a version for bass guitars! They are a direct replacement for many of the Schaller guitar tuner range -including their excellent locking tuners. Tuning is much easier as you can just roll the tuner between your thumb and 1st finger, instead of constantly tuning and readjusting your hand's grip. Whether you are using locking tuners or not, it's nice to not have to use those string winders to save time restringing. At first it's not apparent just how useful these tuner buttons are, and I guess some could be put off by their 'space-age' appearance, but after a few minutes in use I'm sure you'll agree that this is one of the easiest yet best modifications you could ever make to your guitar.