Where I am most of the uncoupling membranes are more or less in and around the same price depending on the quantity ordered, between £7-9 per mtr basically.
The above product imo was excellent, it was very thin, 0.7mm and flat, so used very little adhesive compared to Ditra. It's similar to BAL rapid mat which I've used loads of, although it has a composition like that a roofing membrane in that there is a mesh like structure to it through a fleece like material. When I had to remove damaged tiles I honestly couldn't believe how hard it was to do it. I used a Botament system from start to finish, primer, leveller, adhesive, mat and adhesive etc.
I was very concerned about the floor I had to cover and their technical director for Ireland met me on site and gaurenteed that if I followed his spec that it would not fail. Having utmost faith in Schluter I contacted them and went over the particulars of the job with them in detail and they said they couldn't do what Botament claimed they could and that they'd never even heard of the company, which by the way is global.
Botament told me that their membrane is so advanced that it's the way all membranes will eventually end up like and to be honest I can see why.
Sorry for the long post, but I wanted to give you the best feed back I could.