I have to agree with Robb. Back in June, a friend and I drove 6-7 hours to Great Adventure from Rochester. This also happened to be opening day for Bizarro.
The park was pretty well mobbed, mainly from bus groups. We purchased the regular Flash Pass, and it was worth every cent. For the first 2 hours, it seemed to be in Gold mode, as all of our waits were less than 15 minutes, allowing us to bypass a 1.5 hour wait for El Toro, a 1 hour wait for Bizarro, and 1.25 hour wait for Superman, each multiple times. After that, the times started to increase, but with that extra time we ate, went to the arcade, rode some flats and hit a few other coasters with smaller lines. Without it, we would have spent half our day waiting for 3 rides, making the 13 hour round trip drive not worth it.
The only gripe I have is that I think our bot could shut down Nitro. Each time we reserved, it went down for a decent amount of time, and we never got to ride. Upon making a new reservation for something else, it would start back up.
When by yourself or with one other person, I feel the price is a bit steep. we had purchased discount entry passes (ours were $25), so it was a bit easier to swallow.