Yes! We used Ditra. It was a little more expensive than cement board, but it was soooo much easier to work with! By the time we factored in our sweat and possible doctor co-pays, we decided to go with this stuff.
It's been very easy to work with and has done it's job. Without it, the tile would have been an easy 1/2" higher than the rest of the surrounding flooring.
Tile is a lot of work, but definitely worth the outcome. We plan to finish laying it out today so we can finish grouting tomorrow.