At the gym i attend. We do have the "Oh Sh*t" secondary rack.

We do have two squat racks like shown above ^

But we also have one of these "assisted" racks like this BAYOU-FITNESS Commercial Half Cage Smith Attachment E-7625

And another one just like that, but it looks like a normal squat rack, its straight up and down unlike the one in the picture shown above which is on a slight incline/angle.

What are your thoughts on those?