Hi there,
I will give you the opinions of 3 people that rode it in our family.
Myself - Roller coaster lover - I thought this was fantastic, you can watch the big drop from the viewing area before you decide to go into the ride queue area and i must say that it looks much worse than it actually is. Expedition everest is so well themed, the whole thing is excellent from start to finish.
Daughter aged 10 - Roller coaster lover- It is not as fast as Rock n Roller coaster, It is about the same speed as Big thunder mountain but with a large drop (looks much worse than it is) The ride goes backwards for a short time and some parts are in the dark, I did think it was a little scary in some parts but I just wanted to ride again and again.
Daughter aged 9 - I loved Big thunder mountain this was my favourite ride ever, I thought it might be the same as this but it is'nt really, i was not sure the first time i rode it, probably due to the anticipation of wat was gonna happen but once i got used to it just wanted to go again and again. It is nothing like rock n roller coaster at all.
Hope that this helps. It really is something special not only visually but the ride is like nothing else there. enjoy xx