Two summers ago I panned the Seacoast Fun Park for its terrible management of the water slides the day we went (letting big fat teenagers go down too soon after little kids and nearly swamping them under) and the crummy mini golf course with no shade and unleveled surfaces.
But today on a hot and muggy July day, we had a great time. The price seems to have been reduced from $18 or so two years ago to $15 for an all day pass that can start as early as 11 am and go until 5 pm. The price is still rather steep for locals who might want to go often but you can get a yearly pass to the slides and pool for $40 which is very reasonable if you for 4 or more times in the summer.
Today it was not over crowded and the attendants kept the kids under control and safe. I just wish they had more shade for the parents who don't want to shell out another $15 bucks.