I genuinely love musiclily products, and use them all the time in my shop. But there's a SERIOUS issue with these frets. After installing them, as I leveled them, a few were just not being touched. Turns out that SEVERAL of the frets in the set were of a completely different height than the rest. This means I now have to unmask my fretboard, remove all of the mismatched frets, reinstall properly sized frets, and deal with even more extra work pre-filing the new frets which will be higher than the rest now. It's 1am and I have a job to finish that I now have to stay up at least another hour dealing with, when I was almost done.If you're doing this work professionally like I am, do not use these frets. It will cost you more money than you saved by buying them. They are a good value for the money in theory, but the fact that the workers are so poorly trained that they'll just top off a box with completely mismatched frets is an inexcusable problem. This will cost me twice as much money as I saved by buying them. Not worth it.Edit: ANOTHER set that I installed a month before leaving this review turned out to have the same issue! I installed them before finishing, and upon leveling the frets tonight, I noticed the same problem. This wasn't a one-off issue. This is a serious, continuous problem!