From what I remember of it, there is no eccentric componant to say the 'squat' or 'overhead press'. Is this still a valid piece of exercise equipment - could be invaluable if you live in a flat (apartment) and want to pratice the snatch (bumpers would sure wake-up the neighbours). Or a swim trainer as my friend did.
Did a search, they still make 'em; Exer-Genie from TheTrainer made in the good ol' US of A