Sami B2B Lock,Password Protect

Sami B2B has been great. I am new to Shopify and wanted to setup a way to have dealer access to certain products, and regular customer access to other products. Most of the apps I found have a monthly fee but then I randomly noticed Sami B2B mentioned on a forum, and it was free, easier to setup than the others, and they provided quick support when I needed it.