Thank you for this excellent extension! Using this filter for our accessories site and it works like charm. Filters by categories, price, manufacturers, taxes, discounts you name it. Search speed is amazing even with thousands of products (we have over 11 thousand products and it's so fast compared to others).
At first I didn't understand how to make one field appear after the choice was made in another field, the support responded very fast and helped me with configuration. The module is awesome, highly recommend!