I haven't & I wont. It is suppose to make them FEEL full longer so that YOU can get more sleep. To me, that just seems selfish...but that's just my opinion. If you think about it though, to keep them feeling full longer, they would have to make it heavier on the stomach, & formula is already heavy on the stomach that I would think it would cause upset tummies & possibly other problems with digestion. Babies need to eat every few hours, if you're lucky enough to have a baby that sleeps during the night that is awesome...but I don't think they should be made to sleep longer than their bodies think they should.
at 4:05 AM on Dec. 19, 2009