He wasn't a squirmy eater and had no reflux issues (though was colicky), but he always drew his legs up to his tummy. Oval helped a lot, even when I gave it to him on its own within a few minutes he would start passing gas and then he'd feel better. So, I just started adding it to every bottle. He did get a lot better over time. At 8 months I switched him back to the regular 6-12 month Enfamil and now he's down to 1 BT bottle and I use the 12-18 month one.
I tried Similac Sensitive but I found the Gentlease better. My doctor also told me I could try Soy, but I decided not to because it wasn't a lactose issue and I read that you aren't really supposed to switch to Soy unless absolutely necessary (lactose intolerance or otherwise).