[Plugin: WooCommerce – excelling eCommerce] Anybody using Woocommerce product csv import suite

I am thinking of purchasing it. Any tips or bugs or tricks I should know about?
I want to use it for variable products, but only size and color, price and maybe a description. pretty basic.

The sizes will be s,m,l, so how would that be displayed in the csv file, seperate rows or s/m/l/

Thanks!

http://wordpress.org/extend/plugins/woocommerce/