I've had some real good sucess with If wagers, both at Millennium and Pinnacle, but there is a big difference between the two books. At Millennium the 2nd half of the if wager only is allowed to be a risk of the max amount of the first wager, which is semi-retarded, you should be able to risk the amount of the previous wager PLUS the amount you would win if your first play wins, thus the term "IF WAGER". At Pinnacle this is exactly what you can do, however you must call in If wagers at Pinnacle, no idea why they aren't on their website.
Anyway, i like these wagers alot, sure help if you happen to be short stacked..