Mattia, this is a 20 dollar kit that is targeted at people who want to do quickey fret levels on cheap guitars IMHO. For that it works fine and is decent value to me. No argument is going to change the improvement to this near death Seagull acoustic guitar sitting in front of me. The thing was completely unplayable, now it plays great, not a buzz anywhere. Was it worth 20 bucks to me for that alone, yep. If I throw the kit out today it paid for itself on one guitar. I will probably move up to more traditional tools, and this kit will have given me the confidence to do so. Could I have gone out to Home Depot and pretty much bought everything in the kit, likely...but I still think the kit is decent value.
Perry, at no point have I claimed this kit was a replacement for traditional tools or have I touted it as top quality. I've said on numerous occasions it's decent for leveling frets on cheap guitars, which is what I bought it for as I've picked up a number of throwaway guitars to practice various repairs on (haven't destroyed one yet).
As for Ben, no don't get all high and mighty on me here Perry, your post clearly stated he took too much off, he would have done that with ANY tools and you know that. Common sense dictates, just by looking at the tool, you'd want to mask off any fretboard you don't want sanded. What kills me, is you went ahead and charged Ben 300 bucks and are now laughing at him that he;ll be back in 12 months for a fret job. If I'm Ben, I'd be asking you why you didn't offer up this info before you charged me 300 bucks for a temporary repair?!?! Could you not have done a re-fret and fretboard re-fin for under 400 bucks?
LOL, and I was waiting for one of you guys to ask me the paranoid question of who I was and what I was up to. Just a guy who bought the kit and it worked for me. I did a search to read up on the kit, found some good and some bad. Google "Thomas Ginex", this thread comes up number 5 or 6. Look at my first post, it's answering the guys original question of opinions on the kit, I gave him mine. The kit worked for me, because I have a decent knowledge of guitar repair (still learning) & I use common sense. If you have no common sense and shave of 75% of the fret material with any tools, you can't blame the tools.
And Perry old boy, if you think it's acceptable to mock your customers on a forum and hope more people booger their guitars with kits like this so they can give you more money...then why would you ever think I would welcome help from someone like you?!?!