The worst part was Fastracks. Alton Towers needs to re assess the amount of Fastracks they sell. We were queuing for over 2hrs, barely moving, until they closed the queues for the fireworks. Once the queues were closed the line actually moved at a reasonable pace.
The ride itself felt very much like a smoother Saw ride, with less force (sorry I found very little air time, I expected at least the same amount as Rita). I really really wanted to love this ride, but all it did was ruin the day for us, the queue was unacceptable and we ended up leaving the park after this ride missing the fireworks we went up for.
The Fastracks, and queue ruined what could have been a semi good ride. They really need to put in toilets in the longer queues for people with child sized bladders like my wife, even the best rides cannot justify over 2 hours with no where relieve yourself. One thing it has done though is allow us to get on the quality rides much more quickly (Nemesis you're still the king!).
We also were in the queue shortly before it closed for the fireworks (although we also got Oblivion in before X Sector closed at 6pm). The queue board stated 120 minutes but we were on and off the Smiler within 90 minutes which I thought was quite quick for a new ride on fireworks Saturday. There was a big gap in the queue after the shop though!
I agree that Nemesis is a much better ride, but the Smiler is fine and I really cannot see why this stopped you watching the fireworks? We had plenty of time to get a coffee and get through the mud on the lawn!
Also a 90-120 minute wait with no toilets shouldn't be an issue, this is the same as going to the cinema or some theatre shows! Nemesis, Oblivion and Air all had 2 hour plus waits in their opening years and there wasn't a need to put toilets in queuelines!