Starting i would like to say that this is a very good module and covers all the basic needs of filter search. This module can be perfect just perfect if it has some extra features. The module lacks of some basic things like: able to filter categories, able to index the information of the fields and apply for filter search(eg: a user submits a property and he asks for a price that will be input with text field. The module can not recognize this price). If these can be apply will be close to perfection.
But i am saying again this is a very good module as it is!