Ditra vs cement board

Although I have not used the ditra product yet I find it a wise choice. People have installed tile without any underlayment, with cement/concrete, cement board, and now a flexible underlayment. It will add about $2/sf, but it is important for homeowners to consider the reduction in installation time. Contractors will like working with it because of being less mess, quicker to install and better long term performance. There is still a larger number of contractors using cement board but I think homeowners should realize the value in upgrading to a product like ditra, especially in places with unstable soil like the south west.