TeaVivre is an interesting tea company, a recent startup, which immediately got my attention. The company sells exclusively loose-leaf Chinese tea, and it ships directly from China.
I have sampled quite a few teas from TeaVivre, and I have found them to be consistently fresh. Perhaps more importantly, I also find them to be "true to the style", which means that teas of a particular type tend to taste like typical examples of that type. This is particularly useful for people who are already somewhat familiar with Chinese tea, and have a sense of what types of tea they like.
This page gives an overview of the company, and then delves into reviews of specific teas that I and others have sampled.