Edit: I've uploaded some comparison samples one with the booth and one without as requested. Download them here.
They're both really mono tracks, but I exported into stereo on accident.
Looks good! I've thought about making one myself, my only concern is where the hell do you put it? What do you mount it on when a singer wants to do vocals standing up?
I think I'm just going to use an adjustable drum throne propped on my desk. It'll look super ghetto, but you can probably tell that's the least of my concerns.
Cool ... I definitely hear a big improvement ... the room caused this nasal-phasy effect that the booth eliminated. Sounds a lot clearer and the "body" of the voice sounds a lot fuller also.