I'd actually say the iGallop is an excellent rehab machine.
Seriously. I'm not joking. When I popped my back last year, my chiro had me on that thing for 5 minutes after every adjustment. The trick is to keep your feet up and your hands in front of you or behind your neck. So the only thing you have to balance yourself are your lower back and hips (specially the glutes).
You might squat till your heart content and think you know how to activate the glutes, but dude, this device really gets you to trigger muscles you didn't you had in your hips. I did make a difference in improving my sitting posture.
Having said that, the commercial is fucking stupid, sexist, and lame beyond redemption. The iGallop is a decent, legit rehab device, but the commercial doesn't make it justice, and in fact, robs it of any legitimacy in the eyes of potential users.
Whoever marketing genius that came up with it needs to have a family of angry porcupines shoved up his ass for punishment.