I always used undercover tourist, for years, and then this year found parksavers. I was skeptical at first, I was very comfortable with UCT and liked getting the actual tickets in the mail, but parksavers was considerably cheaper so we went with them after reading threads here about them and it went very well. I would recommend them. We did the buy 4 days get 3 free (so 7 day hoppers) then upgraded to APs our first night there in may. I just wanted to ticket with the biggest savings to do the upgrade with, and that was the best I found.