I ended up getting two sets of these -- this standard version and also the "ultra" version which adds staggered post heights for "tuning stability." They look the same otherwise. I'm saving the ultra for a future project. They're both similarly priced and are of good value. Do verify your current guitar tuner setup -- and if you have a "modern" setup with 10mm holes for the tuning pegs, you'll also need to buy some 10mm tuner bushings separately to get these installed (and not use the included bushings, which are smaller). Generally, if your original tuners can be tightened with a wrench on the top-side, you have a modern setup... these vintage tuners will still work, but you need to buy bushings (and be handy enough to drill guide holes in a straight line for the screws). If that sounds tough, just buy a modern set of tuners (don't be like me!).I got these tuners to upgrade a short scale Squier mini-stratocaster, which has notoriously bad stock tuners. They install easily, but since the screw holes in the guitar are setup for "modern" tuners, you'll have to have the knowledge and steady hand to get the holes drilled in the exact right places. I got it done, but they're a little crooked.Once installed, the tuners work great. All the strings lock in place nicely with the little knob on the back of each tuner and they stay in tune very well. I'm not all that sensitive to the workmanship not being completely perfect, as this is my travel/practice guitar.