Food/Tea:
Their bubble tea is freshly made in front of you and tastes good. Their macha latte is pretty bomb. They also have a seated tea tasting experience. Although I haven't tried it, people look as though they're having fun when doing it (looks like a good date idea). Icha tea doesn't have a set menu, and from the times I've been they seem to have random food items. If you're planning to eat I'd recommend going somewhere else, or eating beforehand.
Icha Tea is a great place to work and chill. It has great wi-fi and comfortable seating. Every other table has an outlet if you want to charge your devices.