May I join you?
We (myself and 4 children) live in a two-bedroom flat. I haven't actually measured, but I estimate that it's between 1,000 and 1,500 square feet.
I used to think it was too small (although it is bigger than the 750 square foot townhouse we lived in before I graduated!!) Now I realize that it's just too full, and I have been de-cluttering with a vengeance lately to correct that problem.
So far I have completed the study area, and made some serious progress in the sitting area and the bathroom. (The best part is, as I make headway in the areas of the house that are my responsibility, my children are starting to de-clutter their areas, as well!