Hard to find a better supplier for manga and anime, though there is room for improvement.
I have been ordering manga and anime from Right Stuf since 2015 and have not found anywhere better overall. When I occasionally compare pricing and selection, I typically find that they can't be beat when it comes to books and DVD/Blu-Ray discs. They are generally quick to ship and pack for shipping better than any others I have ordered from. I recommend some patience with the free shipping option. Sometimes it has taken longer than expected, but I have never not received an order. However, being great means maintaining a high standard and if I have one serious complaint, it would have to be with Customer Service and how Support Cases are handled. I try to be patient and submit my questions and issues via the support case form on the web site. The problem is that when I get a response, the case gets closed and I have found it impossible to follow up and get additional assistance or information. It feels like "here is an answer to your question; take it or leave it" and that has been incredibly frustrating for the last few cases I submitted. They were never resolved to my satisfaction - I got an answer, but that answer included a suggestion that might have worked, but the case was closed and though I could add a reply, I never got an answer again. I eventually figured out a way to work around the issue myself. I hope to see some improvement in that regard because the experience has left me a bit disillusioned with Right Stuf recently. It was not always like this.