Having built plenty of supercharged falcon/commodores, i dont really rate them. A centrifical blower has a boost curve that goes up linearly, the more you rev it the more boost. Unfortunately that means if you want 15psi at 7500, you have to gear it then live with 10psi at 5000, which means you are close to 100rwkw behind a similarly sized tuebo setup at those revs.
Centrifugal blowers got you out of the hole, but are horribly inefficient, power hungry and once again if you want top end you need a blower the size of the slab of beer your wife drinks nightly.