Throughout the entire house the return air vents were at the top of the walls which I thought was really strange, so all those were moved down to floor level. They are much easier to hide behind furniture that way. :)
Three of the walls came down quickly. This one however had several light switches and the thermostat involved so it took a bit more thought.
I love how it opened up the rooms. If it were up to me I'd knock down that wall you see in the picture below and have it completely open.
(* That is a load bearing wall and we can't knock it down. I asked.*) :)