I used Orbitz for a trip in 2013. Had no problems what so ever. Did a split stay: Pop and CBR. Both reservations showed up on my Disney account. It was during the Magic Band test run at Pop, and everything synced up exactly as it should have. I would use Orbitz again for a Disney trip in a heartbeat.
At Pop we booked a standard room. Ended up with a very nice first floor pool view over by the 80s/90s area. At CBR we also booked a standard room. And were still able to log into the Disney site to do online check in and put in a few requests. It was all super easy and very well done.