CustomFilters allow you to purpose filterings functionnalities to your customers. With CustomFilters, my clients can easily choose a category (t-shirts for example) and finally select the brand (manufacturers) they're looking for.
But they can also select a brand and decide to display only some categories (Caps, pants...)
With customFilters, I can also creat a direct link to a selection of products !
In my menu, i can creat a link to a brand but with only 2 categories (kind of products) selected!
I can also creat a link like "Less than 10€"!
About the support.
This is just the best support i ever had for a component/extension for Joomla/virtuemart.
Always (I mean... ALWAYS) have an answer for every questions, in less than 48h.
And it's not just like "You will get quick answer" to finally send a preformated answer with a link to a tutorial.
They always understood the problem and try to give the best help as possible.
They have an efficient, fast, and SMART support.
The custom developpment is also very fast, they provide the improvement that you need for a very good price.