I just checked this out by playing a few games. It is so beatable it isn't funny, I won every game with minimal play. Busted shortstacks left and right with no more than top pair. Funniest was AA on the flop, BB pushed all in and called by another, I just had to call with pocket aces,lol. (villian 2 on flush draw)
Downside is
#1: Time involved to double (less house rake).
#2: only doubling buy in less house take, not as much proffit as regular STT's (but proffit is proffit!)
Still easy money imo. Easy to multi table, esp. with turbo's for max $ per hour.
btw, only 2 sitters that came back to the game near the bubble. Was concerned about playing against a couple live playes and the rest of the table sitting out by reading other posts, didn't have it happen to me.