the small format of this tool means you can pack it in your under-seat tool kit easily, without making room by tossing something else out. it is easy and intuitive to use, but the ability to only hold 5 tools at a time (and thus needing to carry the case as well with the other five tools) and the limited amount of torque you can apply with these 420 stainless wrenches keep it from getting the full 5 stars.