I purchased this as a starter tool kit for my son to learn the craft of setting up his instruments. You may feel some of my judgements a little harsh, this is because a professional luthier judging this kit is like how a pro musician would react to a beginners guitar!
Overall the tool quality is low, I didnt expect miracles and have personally spent five times the cost of this entire kit on a piece of straight metal from a tool shopl, but i feel most items here are token tool shaped objects rather than usable tools... I will give some examples;
The inch scale on the rule has been misaligned to the edge.
The capo is really stiff, I wouldn't trust it not to mark a neck
The screwdriver is really cheap, nasty and not suitable for any screw in a deep recess.
The allen/hex keys could or should be in some sort of wallet so one can easily see when one is missing.
The fret protector has some sharp edges and needs prep before use. As a pro I know that but I bet many people will discover this when it scratches their fingerboard.
The zip on the wallet is hard to get hold of because it disappears into the folds and the allen keys will fall out if not fully closed. I solved this with a short piece of string tied to the zip toggle!
I put the kit to a fair test, by using it on the next set up job on my bench. 10 seconds in i noticed a loose pot...and there is no tool in the kit for that. That, and lacking anything to polish a fret, aside the tools provided did manage to do the job.
The feeler gauges are possibly the highlight of the kit.
All in all, if you have none of the tools then grab this set, however i don't think the value is here if you consider most of the tools are 'pound store' quality.
I also think overall the product could have been better thought out with things such as a large and small reversible screw driver instead of the one universal driver provided, a nut wrench of some sort and maybe something mildly abrasive.