We just did this yesterday and it's an AWESOME service, but I'm really not sure how long it'll stick around. I see people mentioning crowds and limiting numbers of people and full buses. We rode it 4 times (park hopped to all 4 parks and then back to our starting point) and on one bus there was one other couple. The rest of the time we were the only ones on the entire bus. We also never saw anyone waiting for the buses during the time we waited (we usually got there about 10 minutes before they told us the bus would depart), or when getting to a new park. I'm just not sure how they're making any money with so few people. Here's what we found as far as schedule:
HS - left at 10:20 (buses to MK at 20/50 past each hour)
MK - left at 1:30 (buses to AK at top & bottom of hour)
AK - left at 4:20 (buses to Epcot at 20/50)
Epcot - left at 7 (buses to HS at top & bottom of hour)
We thought it was kind of cool seeing behind the scenes, as well as having a bus with "VIP" on it for you.
Plus, of course skipping bag check is a huge advantage. Just a few thoughts:
-HS was really nice as we rode RnRC and it was right there, benches to wait on in the shade, and about a 20 foot walk to the bus. Plus some cool things to see behind the scenes as you drove out
-MK was HOT! There were no seats and the waiting area was in direct sunlight. We timed it to just get there right before the time so we were able to get right on a bus but it wouldn't have been fun to wait here. We also really didn't see anything at all in this area that I'd consider "behind the scenes" that you hadn't seen if you've ever walked over from the Contemporary. MK stop was a moderately short walk though from near Buzz.
-AK you were behind the scenes for a long time on roads even leading up to it. Lots of greenhouses and props and things that were cool to see, plus when you got there you were WAY behind the scenes. Neat as far as seeing things; not neat as far as walking. We were getting tired by this point and the walk there is probably comparable to the walk out to the bus stops (actually maybe farther). Plus it's way back in the corner by the safari so a walk just to get to it in the first place. I'd definitely plan to do KS right when you get there or before you leave so you're already in the area. It was fun since you're escorted all the way back to have a CM to talk to (to yourself!) but this one was definitely not as convenient as others.
-Epcot was also really easy like HS. No seats for waiting but at least a really short walk to/from the buses. Behind the scenes was mostly the backs of buildings but still fun to see from behind.
Couple things I hadn't heard mentioned:
-Last bus was at 8. I assume this would change at differen times of year but several of the parks were open later but you couldn't use the service after that.
-If the last bus was at a time that the park was closing, the dropoff would be outside the park. We were heading to HS where we were parked and told if we took the 7pm or 7:30 bus we'd be dropped by RnRC but the 8pm bus (8pm park closing) would just take us to a normal bus stop. That actually might have been more convenient for getting to our car but we were too tired to wait that late, plus got some nice last pics inside the park.
-They told us they have no way to do upgrades. If you buy a one day ticket, there is no way to change it to the 7 day option (and get credit), so be sure to buy 7 if you might want to use it.
-Each time they just scanned our MB's before we went by the bus to wait and that both confirmed we had the service, plus I'm assuming that we had the hoppers/showed them our entry to the next park.
-Every bus we took was equipped for ECV's.
-Buses left exactly when they said they would.
-Every single CM we dealt with regarding this (drivers, behind the scenes, waiting areas) was super friendly and helpful and honestly made you feel like you "were" VIP's!
I strongly recommend this! Going to try to do it at least once more with my husband (it was just my son and I yesterday) soon so he can experience the fun too.