Rode four times this week, and since I'm an uber geek, I tried to pay close attention. So here is a very detailed report....very spoilery.
Skipping the lines (cause you can see good videos of those online).
When you get locked into your seat, look up if you haven't at the floating candle effect.
Then look ahead when you hear Hermione speak, you'll see her in a mirror/screen throwing the green dust on you while speaking the spell incantation.
Video screen of you traveling thru castle halls/walls
Live set of Astronomy tower as Harry and Ron's voice yell that Hermione has done it (great time to look down to see the kuka arm below you - only time I could see it clearly).
Video screen of following Harry out of tower and flying around Hogwarts. Stop in front of Hagrid warning about dragon. Then you see dragon go after Harry and fly around you. He goes one way and you fly onto:
Live set of bridge with dragon trying to break it down to get to you, turn around a bit and dragon breaths "fire" at you (hot steam) Smile for picture!
Then get sent into forest: live set of spiders. Aragog spits at you (water droplets) and smaller spiders hang down over you (there is a picture here too at one point, but not for purchase) Hermione shows up in a cavelike image and says she'll get you out and says anti-spider spell (which I can't spell and don't have time to look up).
Then the whomping willow tries to whomp you and you do go on your back here, almost upside down.
Finally you get out of the forest and go back to video screen of Quidditch, where Draco makes a snide comment to Harry about you, you cause Ron to miss a goal, and the demontors show up to chase you and Harry. You lose him as you head into the forest again.
Live set of creepy, dementor filled forest/caves. They are close and creepy. (On our third visit we got stuck here for a bit with one in our face....ah good times...hehe). One gets close to you and lights up, as you back away through fog screen you see your faces in the fog (picture taken during spiders, mentioned above). Be warned, if you get stopped during ride, or something goes wrong the effect won't work and you just get light and fog.
As you try to escape dementors you go thru the Chamber of Secrets. We see the stone snake head, then basalisk bones that hiss steam, then we go on our backs through the Salazar Head statue, before going back to cave full of dementors. (Interesting factoid: My friend's company built Salazar's head, and they had problems getting it in place because the A/C ducts were installed in the wrong place. They made it work, but if you look up you can see the ducts. Apparently the jaw of the statue was made to open up wider, but you can't really see it because of you position, so I don't know if it did open up behind us or not).
Back to video screen of Harry's patronus shield and the dementors flying away, then you follow him thru caves that are caving in, you get out and fly back to the castle. Go in thru the front courtyard and doors and switch to:
live set of castle hall with big screens that show Harry and friends in common room welcoming you back and Hermione, Neville, Dumbledore and Hagrid in second screen waving at you. Then back to screen of walls, before landing and getting off.
That's all I can remember, but hope that gives you more details. Unless stated, the benches are upright and feel more like typical motion simulators motions.