I received this a while ago and have been up able to give my thoughts on it as I wanted to test them all make sure they all worked as described. To do that I ordered a tool that would test these fuses for me and after going through all of them there was only 1 that seemed to be faulty and in a box of over 300 fuses that's less than 1% being faulty and that's fine with me.
Another great feature is the included box that keeps your fuses organized so you don't have to go digging trying to find the right one.
In my opinion if you go through alot of fuses or have a use for different size fuses this is definitely something you should look into.