I've been doing this lately. A kid at the gym came over and asked if I would help him. "A spot? Oh, sure!"
He said 'No, the Tabata squat'. He explained the deal, and that if I did 'em with him, it would help push him. Um, sure? I mean, that sounds like a challenge, and I'll be damned if some kid will beat me in that.
So we were off. 3:30 later We're glaring at each other, drenched in sweat, knees shaking, and with the most knarly, massive quad pump I've ever had. I got something like 18, 18, 17, 17, 17, 16, 15, and failure on 14. He got slightly more, but not by much.
So now I do em once a week. I've noticed that I respond well to very high rep exercise. Jump rope grows my calves WAY better than calf raises; competitive mt biking gave me better quads than weights. Well, my quads LOVE the Tabata, regardless of what the rest of my body is saying (big middle finger!).