I used it in May (right after it started) and again in Sept and highly recommend it. In May I walked staight to the DME check in desk and then was able to walk onto the bus to POP, with maybe a five minute wait. Because they knew we were coming POP had LOTS of CMs at the front desk to check us in. My room was ready. I quickly dropped my carry on bag off, checked the room out and went to the MK to eat lunch. My plane arrived at MCO about 9:20am, by the way. When I got back to the room that night my bags were waiting for me in the room. On the day I checked out I went down early, checked both my regular bag and my carry on bag for the return flight, got my boarding pass, then went to MK for a character meal. I got back to the resort about 3:15pm and hopped on the DME bus about 3:30pm. It went straight to the airport with no stops. Because I had checked my carry on bag for the return flight I was able to walk straight through the airport. It was wonderful, feeling so light.
Except that we didn't check our carry on bags for the return flight (due to breakable souvineers) we had the exact same experience in Sept. My family got in the POP line while I checked us in at the DME counter. As I walked over to the POP line, my family was letting other people go in front of them and was calling to me to hurry as the bus was there. We had zero wait to get on the bus. POP is the first stop for DME, our room was already ready, and we were in the parks by lunch. Our checked bags were in the room waiting for us when we returned from the park that night. We checked our bags the morning of our departure, got our boarding passes, and went off to the parks. We picked up our carry ons that afternoon and hopped on the bus for the return trip to MCO. The bus returning us to the airport did not stop anywhere else.
I'll be using DME again in Dec and again in Jan. In Dec I'll have my 73 y/o mom and in Jan I'll have my 9 y/o GD with me. I have absolutely no hesitation in using DME.