Souvia is a lovely little tea store. For anyone who enjoys a top-quality tea I highly recommend trying this place... they have over 100 different varieties of loose-leaf. They also offer classes in "tea appreciation" and advanced tastings.
The only reason I'm not giving then five stars is because the ambiance is so spartan. There are tables and chairs if you would like to enjoy a pot of tea in the shop but it doesn't have a very cozy feeling.
The shop is aimed at selling loose teas, and that's what they do well.