I've made a couple of short VIP trips to Chessington recently, and a full day at Legoland Windsor yesterday - so I can add to Paul's excellent trip notes.
My main gripe has been the arrivals process. Despite doing the online booking each time, they didn't appear to know we were coming:
Chessington 1 - both VIP spaces in the car park were occupied by one huge works van, so we found another space. Left waiting in the hotel for 20 minutes until someone showed up with the wristbands.
Chessington 2 - no spaces at all in the hotel, went to the main car park and went to the main entrance gate. About a 10 minute wait for the wristbands.
Legoland - chap at the car park entrance radioed that VIPs were here, and told us to go to Car Park "A" sign, where we waited for about 15 minutes until I got fed up and went to the main gate to chase them up.
I will drop the team an email as I think this element of the procedure could be tidied up. For example, once you have done the online form, it would be good to get an email back saying the request has been received / the park have been notified and will be expecting you. Also especially for Chessington, whether there will be a space available in the hotel car park (don't mind if there isn't... just would like to know!).
However once we were in Legoland - WOW!
Amazing VIP experience, I fully agree with Paul. My daughter (7) has just graduated to liking the Dragon, so we bypassed the 45 minute queue and got straight on. She wanted to go again, so up we went, and bang, straight on again. On the third time round, there was a queue of about 6 people with Q-Bots, and the staff member plucked us out and told us to move to the front (i.e. bypassing the Q-Bot customers). Felt rather special, but could feel angry eyes burning in to the back of my head.
We went on about seven times in all, in about 30 minutes or so, all told. Incredible. And then with the smaller one (Dragon's Apprentice), we went on a couple of times. The guy was arguing with a Q-Bot customer who had got the time slightly wrong, and they were turned away, as we meanwhile swanned on waving the wristbands.
On the Longboat Invader, here we scored as well, because there did not seem to be a Q-Bot entrance at all. So we appeared at the ride exit and got straight on (assume that Q-Bot customer have no choice but to use the regular queue line).
We did Driving School and Boating School quite a few times. On most of the rides, staff were noticing the VIPs and asking where we would like to sit, etc. Absolutely 100% top marks for the staff there - they made us feel so much more special than all-day-Fast Track customers.
On most recent summer trips to Legoland, we've just walked around a lot, queued for 45 minutes once, and gone home. Yesterday was an outstanding day. We were there right up until closing time at 7pm, went on countless rides, and had a absolute blast. As we were leaving, we overheard a girl saying to her Mum that there were lots of things they didn't get round to doing, and the Mum replied, "well, it's just the ridiculous queues".