I would like to share some first hand experiences I had as I got on WindSeeker the night it opened. It probably opened at about 7 pm as that's when the call went out around the park and the ride operators relayed it to guests. I was in line for Dragster at the time, so the line was extending past Wicked Twister at by the time I got around to it. I had about a 1.5 hour wait, plus a breakdown, but all they did was run a cycle without riders. Don't know what it was, but it got back up and running none-the-less.
The lights look excellent at night, though they kind of get trippy if you look at them for too long. Its almost mesmerizing when you're that close to the lights. I don't know if the other 3 will have this, but CP does have a speaker with music playing attached to the ride carriage, which actually works rather well. As for the ride itself, its rather enjoyable. Its comparable to Zephyr or a typical swings ride in terms of the forces you feel. With Cedar Point's, its great being seemingly swung over the lake, which is a much improved view in the day. I felt that the thrill comes from the actual altitude as well as being hoisted up there so quickly. Its kind of a weird feeling looking down, plus its nice having nothing but a lapbar, making for a bit of a feeling of a lack of ride car, also kind of neat at 300 ft.
As for re-ride-ability, I probably wouldn't wait for it unless it looked short, kind of like Crypt. Even if the queue switchbacks are full, it does chew through lines pretty well for what it is. Watching it in action kind of helps pass the time. All in all, I'm really glad Cedar Fair went with adding them.