I downloaded the app and have had difficulties with the display of the items in my live site. I emailed the developers and they responded lightning fast. They solved the issue immediately. After a few additional correspondences with just as fast feedback, I can definitely say that their services are beyond professional and efficient.
BUT after the issue was sorted out I realized that this is not exactly what I was looking for and uninstalled the app. I found that the app has added a bunch of conditions (7-8) to each of my categories and subcategories that was not removed when the app was uninstalled.
I bigger issue is I noticed this and I do not know what else is installed on my site thas also not removed.
If the app is working for you the service is great but if you need to uninstall it, it seems to be problamatic