I've had the phillips version of this screwdriver for a while now, and have a ton of flathead screwdrivers, but still couldn't resist getting this one. Besides looking nice on the tool wall next to the phillips version, it's also a high quality screwdriver with a thinner tip than the standard Park Tool flathead that comes with the screwdriver kit. It always bugged me that the other Park Tool screwdriver couldn't fit in the head of the pin that holds on disc brake pads, but this one works great. Nice, solid feel.
Adjusting limit screws, easy right? Sure, with a bit of knowledge and a bit more experience no problem. So does anyone NEED another, job specific screwdriver to do this? No, but the Park Tool Derailleur screwdriver makes life easy. The elongated shaft provides excellent reach regardless of how tight the space is to access the limit screws. It is well designed and machined. If nothing else drop a hint and get it on your gift list.