We used the Express service last week, Tuesday through Saturday. It was nifty and felt like we knew some sort of special secret, but it didn't turn out to be the game changer that I was expecting. We hop frequently and 3 parks a day is fairly typical for us, but it turns out that we generally like to use the hotel room as a waystation between parks to take a rest, switch out bags or shoes, or whatever. I think we hopped a couple times park to park *just* so we could use the bus service we'd paid for. I don't regret the purchase, and since there was only two of us, it wasn't a big expenditure... but I don't expect that we'd try it again.