CSV Advanced - a few questions about Custom Fields

Hello, I'm looking for good import tool for Virtuemart, and i hesitate between WM Mass Update and CSV Advanced.

I have store with specialistic tools for Saunas, Steam Baths like furnaces, engines, steam generators.
Each of category above have own special features, writen in custom fields.
All category product have different 4-5 custom fields.

Can I upload via CSV Advanced products with any number of custom fields?

I already have structure of Custom Fields in Virtuemart, I there a possibility to easy link it CSV Advanced?