Personally I loved it. I went from Jan 5-11th. My only complaint was getting the bus to the hotel. You have to stand in this (huge...at the time for me) line to check in. I just assumed you'd show the driver your voucher and hop on a bus. You have to check in, then you get into another line based on your hotel. Some hotel lines were huge....we lucked out and they took our hotel next so we got on within 15 minutes. We got to our hotel within an hour of landing at Orlando, about 4:00, went to MK, and our luggage was there when we got back.
Coming home was excellent. We checked in our luggage in the AM before we left for the park, went to the MK, came back, layed out at the pool, and our ME bus was right on time to take us back to the airport. They showed this cute video on the way back, showing upcoming things at Disney (I knew everything, but it was still nice), it had the characters showing you what to do when you get to the airport, and then they sing...Mic...see ya real soon! It was so cute, and if anyone taped it or knows where I can download it, let me know!
I'd suggest using it...it's free, and great!