I remember playing it several times back in the day, at Vegas World and, I think, the El Morocco.
You either win or loose very quickly. It seems to magnify your luck, good or bad. Mostly I lost. What a surprise, but one day at the El Morocco (?) I hit a streak and kept hitting good on tied hands, Aces, Deuces and Treys kept landing on my tied 18's 19's and 20's. It was a blast, and the most I ever won at a 21 table. All of $100 up, but I only bought in for $20.