MSS FERRAMENTAS DE COMERCIO GLOBAL LTDA review for Sami B2B Wholesale Pricing

I tried to use this app since the feedback is good, but the app just doesn't work. I enabled the app and the page went down, I tried to configure the registration form to add tags to the clients, but the app froze, I created a page and added the registration form and nothing showed. Nothing worked, the app is useless. And after all this bugs and the support asking me for adm access to fix the problems, I felt unsafe using this app.