Coffee Tree offers a number of different places to sit - the open coffee shop with the huge garage doors or back by the fire on the couches. The coffee is okay, nothing special.
But if you want to sit outside without being outside this is the place. The internet is now "free" for an hour so long as you buy something and the staff will readily give you a code whenever you buy something.
As some of the other reviewers have pointed out, you may find it difficult to get a seat.