After having a little while to think about my experience I can conclude that my personal experience at the Rollercoaster Resturant was just okay.
The atmosphere and rollercoaster gimmick was fantastic, however the show played every 20 minutes had no variation as so got extremely tedious extremely quickly. First I must applaud the waiting staff as they were absolutely fantastic - some of the best on the resort. The food however...not so much.
The starter I chose was nachos with various dips and chesse - fairly simple and not to risky...or so I thought. Unfortunately the 'nachos' were so stale and the dips slung into the pot carelessly that I asked for my money back for the starter - the excellent waiting staff instantly offered a refund. Not a great start to what supposed to be a priemium dining experience...
My main was the Spicy Chicken burger. Note 'spicy'. Served with curly fries. The first unexpected surprise was that the curly fries seemed to be standard French fries, which I know is small but considering it's a large part of the menu I'd have expected them to be stocked. The burger was said to have mayo and lettuce in, and so my horror in finding a large tomato in the burger was quite real (as I hate the things!). Although this wouldn't effect me personally, if I had an allergy to tomatoes and I ate this due to the lack of it being mentioned it could have made me sick. Again a bit picky but like I say, sonewhere where a meal can cost £30+ shouldn't have these issues. I then bit into the burger and everything seemed wrong, the sauce was not any form of mayo I'd eaten, and the burger was not spicy in the slightest!
Finally got desert I chose a kids chocolate brownie after hearing this was plenty. That is exactly what this was, and it was very tasty! Finally a win!
All in all, although none of the issues were experience ruining, I must admit this experience has made me weary of going back. This is a premium priced dining experience for a not so premium experience! Although the gimmick certainly is half of what you're paying for - I'd try it again mainly for the staff and the gimmick.