Right now it isn't very useful as there is only one pertinent criterion (swimming pool) (therefore this isn't very selective) and the database isn't shock-full of properties (therefore there isn't much 'noise' in a query result).
However I bet that, with time, other boolean criteria will appear while the DB will grow, leading to more and more need for selectivity (weeding out 'noise').
Niche real estate portal for foreigners looking to buy a property in Spain.
I’ve built it in Ruby on Rails and hosting on Heroku.
Running free trials for realtors in case anyone’s interested :-)
But I would mostly appreciate feedback about what you are missing from existing real estate portals.