I done the old london dungeons back in 2009, so can't remember an awful lot in detail about it... but visited the new one in county hall on monday.
Overall i really enjoyed it, but found it a lot more entertaining with some adult humour, rather than scary, although there were a few parts which did make everyone jump.T
The themeing was pretty top notch in my opinion with some good projected effects (although the castle section with the cannons which was fired didn't really give any effect at all).
The very first section which i thought was the lift made it dissapointing for myself as the actor just pulled on a crank, and i thought that was us going down into the dungeons - but then we went into the actual lift section so unsure what that was about!
The drop on the boat ride was a bit underwhelming, it also didn't use a traditional lift hill, and would be good to know if anyone knew what sort of lift hill it was, as it was so pitch black i couldn't really see what was going on... on the whole though the boat ride section is fine with some nice effects.
The drop dead ride at the end was a bit weird... obviously it was top loading, so the floor had to stay with the ride, but it had flaps which opened up to let the air blow through at you, which felt weird... what made this ride so different though is how, you had the initial drop which dind't go all the way down, and then you were lowered down the rest in pitch black which i would have rather the whole thing be the drop height, although i swear i could just make out some statues in front of me at the bottom, but nothing came of that so i'm guessing the effects weren't working, and then we were pretty much launched back up, and dropped again, and then brought back up for the end - so weird as it is, but definitely adds more of an experience to the straight forward up and down of extremis at the old dungeons.