Great tool for guitarists, light and easy to just throw into a gig bag and know that anytime you need it, it's there. It has pretty much all the tools you'll ever need for an electric guitar, whether it's fixed bridge or not.
Instead of having a load of separate tools lying around and eventually losing them one by one, it's far easier to know that they are all in on place
However, in case you are trying to reach some tight spaces(trying to tighten the screws of a floating bridge, on the back of the guitar for example), especially with the screwdrivers, it might be a bit bulky, and in that case, the conventional tools might be easier to use