I am finishing up my prep work this weekend and will start tiling next weekend. Can't wait!

Bath with BM Warmed Cognac walls

Closet off bath

Makes me want to play hookie from work tomorrow and spend the day up to my elbows in thinset.

This is the same tiler we had when we did our kitchen remodel, so we were comfortable with his work. Of course I wasn't home during the day to see what he was doing.

This is copied and pasted from the FAQ page on my website:

Q: I read in forums to use unmodified thinset under the cementboard for our floors before tiling, but DH read the instructions on the board to use modified. Just wanted to confirm that we are to use unmodified and also to ask why?
A: That�s kind of a controversy in the industry. Most manufacturers say modified. TCNA (Tile Council of North America) says unmodified works best, but then they defer to the manufacturer�s instructions. The way I see it, the thinset under the cement board isn�t supposed to bond the two surfaces. Matter of fact, you don�t WANT them to bond. That�s what the screws are for. It�s there only to bed the cement board to take out vibration between the two layers, so the unmodified thinset makes a lot more sense to me. One thing is for certain, though, and this is important-- THINSET UNDER THE CEMENT BOARD IS A REQUIREMENT, NOT A SUGGESTION! So don't let some slick talking contractor tell you it's not needed! Also, construction adhesive, such as Liquid Nailz, or PL 400 in place of the thinset is a bigtime no-no. Those adhesives will actually CAUSE the voids you're trying to eliminate.
Q: Why don�t you want them to bond? Aren�t the screws there to hold the thinset while it dries?
A)Once you bond the two layers together, you�ve for all intents and purposes, formed a new, thicker, single layer, and you�ve lost all the benefits of double layering the floor, that being the allowance for the slightest bit of lateral slippage between the layers to allow further isolation of the tile installation from structural movement.