I'm going against the grain. We got one for DD and very very rarely used it. I found the way it would position her, she would almost always have a little spew.. kind of like it was crunching her stomach together or something.. not sure ?
Thought it was a waste of money in our case.
But with that said i've borrowed it out to two friends with bubs, one of them was the same as us and didn't rate it, the other used it constantly and flogged it - said it was great!
So i guess it depends on the baby. Good luck!