This place is always packed because it's so good! I've never waited more than 3-5 minutes, though. They're very efficient.
The staff are super friendly and make modified versions of many drinks. I always ask for the London Fog with a bit of lavender in it.
All of their cold drinks in the summer are also delicious, you can't really go wrong!
There isn't usually much seating. In the summer you might find space for two on the bench outside but other than that we usually grab our drinks and walk to a nearby park where there's bound to be more space.