Originally Posted by lsits
The only advantage I could see is if you had to replace a broken head in a hurry these tools will get you in the ballpark pretty quickly. I always do a quick inspection of my entire kit before I pack it up for a gig so I've never broken a head on a gig.
Another benefit is ensuring that you've got at least an even tension across the head. That can be hard to do in a dark, noisy bar at night. I can't imagine that the tune bot would work so well in a noisy environment and it just looks like it would be more mucking about than I usually like to do.