It was a fine enough experience, but just not real...

It was a fine enough experience, but just not really worth the price for me. The pros:
1. Everyone was really nice, and seemed willing to go out of their way to help (my wife and I didn't really ask for much).
2. The dishes were unique and unlike anything you'll get anywhere else.

The cons:
1. For our personal experience, we didn't experience many of the cool things other reviewer seems to have, for example:
1a. We were not invited to meet the chef or tour the kitchen; several other people seem to have been.
1b. We answered their pre-reservation questionnaire, providing many details and extended answers. Other reviewers have mentioned that there were pleasant surprises related to the answers they offered during the meal. We had none of this at all. Zero personalization. Other reviewers have mentioned that they commented on how they were looking forward to trying dishes no longer on the menu, and then they were surprised with that dish. We tried this specifically, and got nothing.
1c. There seemed to be a lot of buildup that the candies you got at the end would be somehow personalized for you. They weren't. Everyone gets the same thing.
2. We simply couldn't understand anything our waiter said. He had a very thick French accent, and was pleasant, but we entirely missed the description of every dish. And the menu you're provided gives very little information.
3. My wife was pregnant, and required a number of substitutions. They were accommodating of this (we let them know ahead of time), but all of their substitutions were for mushrooms. I mean, the mushrooms were fine, but this is supposed to be a uniquely creative restaurant, and my wife ended up having six mushroom courses.
4. There were certain courses we were looking forward to that other tables actually got and we didn't. Specifically, several other tables got the dessert "Botrytis CInerea" while we got a rhubarb dessert. It was fine, but it would have been a treat if we both got a different dessert and could have shared.
5. They called a taxi for me, but then lost my coat and had the taxi's meter running and charging me while they tried to find my coat, doubling my cost for the taxi. I know that's splitting hairs, but they didn't seem to mind charging 3-4 extra pounds to add stuff to your espresso despite charging many hundreds of pounds for the meal, AND adding their own tip to the final bill.
6. The crab/passion fruit ice cream, and the meal meant to simulate being in a forest tasted awful. Simply awful. I was bothered that I had to eat them. It has to be said.

I'm glad I did it because the itch has been scratched. I don't imagine I'd go again, and it wasn't worth the price. I probably won't visit any other Heston Blumenthal restaurants after this. An unquestionably mediocre experience.