We just did the private VIP tour this week. I was planning on writing a post about it because there was not a ton of information when I was looking into it, but I'll post a few things here. When you call to book, they will let you know the rate for the particular date you want to use them. You schedule a start time and you have a minimum of 7 hours, then you can add on after that. They will charge the extra hours in 15 minute increments, so if you just need an extra half hour to finish what you want to do, you won't have to pay for the full extra hour. They will pick you up wherever you want and will transport you in one of their vans. You will enter each park through back/side entrances.
Our guide could take us through any fast pass line and if there was a handicap line, he took us through there. Of course, the guide knows the park really well, so he got us everywhere efficiently and always got us to the nearest snacks or bathrooms when needed. We stopped at Sunshine Seasons for lunch. After the kids decided what they wanted, he took them to get a table and picked up utensils and napkins for us. At one point I was feeling a little sick from all the thrill rides (I'm not used to doing so many in one day), he went to get me a snack while we were on a ride.
It was definitely a rushed day. We did a lot, but it went really fast since we were doing so much.
Our guide was great and being a Disney nut, I'd loved talking to him about the parks.
If you have any specific questions, I'll do my best to answer them.