No real experience with one... but this is the Internet, so I can have an opinion, right?
IIRC the VF is a centrifugal blower, as opposed to positive displacement - it won't have the ruler-flat torque curve of the Eaton blowers. It'll behave somewhat more like a turbo, whch can be good or bad, I suppose, depending on what you're looking for.
Looked like a decent kit at the time. If the car is in good shape, it could be a fun and somewhat unusual toy...
Good luck,
Craig