After going through various "multi-tools" that didn't manage to do even a single thing well, this piece of equipment is just perfect. The string cutter does the job effortlessly, and the string winder is very good, too. Everything comes in a nice small package, yet the tool seems sturdy.
The only thing I'm still trying to figure out is the bridge pin puller. Changing a full set of strings, I couldn't manage to pull out even a single pin with this, and ended up using a teaspoon instead. If the pin is already a bit loose and you can fit the "fork" part under it, it works, but with the knob tightly in place, it's a struggle. It might be a question of technique, so I'm not ready to blame the device yet.