I try to use it when I did fix an old guitar of mine.
Pros
The spong is good
Cons
Well most of the tools is just junk.
The fret file is a joke, as it cant even file anything. It looks like a very bad/cheap stuff you buy from wish. After some frets it worn out.
The files are okey, but useless to do anything with the frets or nut.
You can forget to file the nut with them. You can use it to file the side of the nut if you install a new one.
The fretboard covers is to thick. Ended up using tejp instead. Mush better.
No I would not recommend anyone to buy this. Its a waste of money and it a shame Thomann sell this junk as a Luthier repair care kit.
It just don't have the quality that is useful.