Ok so I've got a quick breather now the event has ended, so a quick review from me. The whole experience is brilliant. The audio is top notch, the pre show is fantastic (It's not too long, not to short, works brilliantly and has a great finale to it). The station looks fantastic, and there's still some tweaks to be done, but everything has a real quality look/feel to it.
The ride really warms up as the day goes on, back row is the best without a doubt. Obviously it's not going to be the most thrilling woodie in the world, but there's some fantastic pops of airtime and the speed is faster than I thought it would be. Coupled with the mist/smoke effects (there's lots, and on murky days it really hangs around like Oblivion's drop) it really creates a thrilling ride. The corner mid ride is a little boring, but it soon gets going again with the drop after it.
Overall I'm far more impressed than I thought I would be, it's Merlin's most polished ride to date without a doubt. Riding at the end of the day as it gets dark is going to be a really fun experience.