I remember this commercial! I used to think it was a scam. I still think it's a scam.
Buuuuuuut, if it weren't $90, and it were say... $50... it would actually represent good value. Granted, the design is bulky... but if it folded up, or offered a little more to it, it's actually really versatile.
If it could hold heavy weight, a device that supports:
1. Weighted dips at varied angles
2. Various pushup angles, possibly weighted if hanging distance is alright
3. Various crunch/reverse crunch/leg raise angles
4. Roller (for ab wheel exercises)
etc...
The idea isn't that terrible actually, but there's not much of a market for something practical that isn't a conventional staple.
https://www.youtube.com/watch?v=TQl9w7r_Nrg