I bought this set of nut files on the strength of the set of six Music Nomad files I already owned (the light guitar set). They work extremely well.
I recently worked on a new nut for an acoustic. Five of the string gauges matched the files from the set of six I had. The low E string was bigger than the biggest file, so I used a normal, non-diamond nut file. That slot took as long to cut to depth as the other five combined. That's when I decided to get the full set.
These files are easy to hold, cut very fast, and leave very clean slots. I cannot say a bad thing about them. The only thing I would like is a 0.075 gauge file, as some bass sets of strings include a 0.070, and 0.074 isn't uncommon for 8-string guitar sets. I can use the 0.065 file and wiggle it around a bit but would like the convenience of not needing to do that.