I've been following the Dorian Yates training program that was featured on bb.cum for a while now an it uses hack squats.
I find them very good as u can concentrate on a good solid deep stetching and squeezing of the quads safely. They seem to be good, that being said I dont imagine u use as many supporting muscle groups on a hack squat compared to a bb squat.
U can only work with what u got available as well
Yates has some great training videos and tips IMO
The new Mike Mentzer!