Only available in the U.K. but....
I like the fluidity of the software and I love the idea of this kind of real estate search. Often it is about the price but just as often it could be about something else like commute times or scenic value.
It would be interesting to see how this could be done using the sliders and something like an overlay of homes actually on the market with additional criteria. This pretty much exists from certain home search providers but not in such a good looking format.