So whats the coo, anyone who has had dealings with Ball Bearing turbos, can you tell me, do the pro's outweight the cons.

i.e. Is less lag worth the price of the units and the fact that you cant rebuild them either?

Although a brand new shaft i and body is always gonna be better than a rebuilt one aint it! how long do these last roughtly, theoretically it should be longer than a standard oil bearing turbo anyway shouldnt it?