I stopped by Modo on a cold night when trying to show the wonders of Chinatown to some visiting friends.
Modo has a slick, modern decor, and is pretty well maintained for a tea shop so close to Dundas/Spadina! In particular I felt that the service was quite friendly and efficient. There are quite a few boardgames available on site, and the menu offers both teas and snacks at reasonable prices.
The tea list is pretty brief compared to similar establishments, but that may be a good thing as I'm always struggling to decide between 100 flavours!
The milk oolong and Rose tea at Modo are both fine grade teas and definitely recommended.