I have just started working with a client who sells printer inks amongst other products.
Anyway, so there are about 13 main categories and then some ink categories with 3 or even four levels deep sub categories!
Being that the inks are compatible, and he sells branded inks, but some sub categories has a few sub sub categories one sub category has about 30 sub sub categories so the pop out menu is deeper than my 24 inch screen.
And if the visitor actually landed on that page, they would see a list of all that printer models so the sub category page with the product list one of the deepest page I have ever come across.
I think my issue is that there appears to be no work around, no better display process for the multitude of products one website could sell!! BUt if the client sell inks for every Canon printer model, how else could a printer make/model be displayed! ?