Just been on it.
I am too lazy for a full review, but I will give you a quick one: The queue offers some amazing looks, but other places looks like the park forgot to theme them. Lots of blank sheets of metal and little theming. As long as you see the area, it's fine. The queue goes pretty much arround the area and as long as you can look to the ride it's fine. The view from the opposite site of the Hotel is really amazing.
The area features lots of steam, even the sewers spit out Steam, and the area is always "dirty". Some places look very bare as I feared, but some views are also amazing. Pretty much as I expected.
You'll have to empty your pockets before boarding. You'll receive a wristband which allows you to open a free locker to store your belongings. They use Metal detectors to make sure you have nothing with you when entering the station. The station has Subway station vibes, and nice lighting with just a tiny bit of fog in the air.
The twisting into flying position is so satisfying, and the whole ride is quite smooth. Not "you don't feel anything" smooth, but just slight vibrations which do not disturb the feeling of flying. Some twists are quite intense on the ends of the train, it has some nice Airtime pops, the most intense one being the exit of Launch 2 in the front. You keep flying over, under and through something which really feels great. It's intensity is not too high, but it can pull suprisingly strong in places.
Overall, I'd consider it a very good Rollercoaster and a good addition to the park. Of my 2 flyers I've done so far, this one is my favourite.
Edit: Is this the best ride at the park? I don't want to judge. I have ridden Taron way over 1000 times and it is nothing special for me. FLY on the other hand is still new and refreshing, so I am pretty biased. I am glad that it has it's intense moments, but as a Thrillseeker I wish for some more intensity in places. But considering Taron was more aimed for Thrillseekers, I do not blame the park at all for keeping FLY more family friendly. It still has the same height requirement as Taron, this should give you a hint of what to expect.