I personally created this project because I have alot of guitars and I thought it would be nice to be able to select between a few of them in a recording session using a footswitch instead of plugging/unplugging over and over again however I'm sure people will find other uses for it.
What I will say is that it gave me alot of problems when I actually made it because I rushed and cocked up loads of stuff like IC orientations etc. so take your time and double check things!