Very powerful filter module. Its easy to customise and works really well - we use it on a couple of our sites. This module in my opinion is essential for stores with large categories/product lists. We did a little modification to the templates make it a little more obvious to customers when they were viewing only the filtered results, so they could clear them to view all results. My only real wish with this module, is if it could me made available to appear in the top of the actual category/products list. By appearing in the side bar under the category menu, it isn't obviously available to customers when they first click into a category.