We love our gazebo.  It's big enough for a couch, two chairs and a coffee table on one end and a bar with three stools on the other end.  We even put a TV out there for the summer.  We hung two overhead fans and two lights on the convenient ceiling hooks.  We live in the Midwest and were able to use it until late October.  I think next year we'll invest in an outdoor heater and be able to use it well into November.

Pros: Windows open and close easily.  Not a drop of water in a very heavy rainstorm.  Easy step by step directions.
Cons: Needed at least four people to assembly.  Gets a little hot in the summer if the fans aren't on.