Similar Doll House
We have a Plan Toy dollhouse that is very similar in it's design. I think that Ryan's Room makes some other ones too.
It's true that the open concept makes this type of dollhouse very good for more than one person to play with. I think the therapists like them too because they can more easily see what the child is playing and because the generic simple design lets kids project their own ideas more easily.
Our 5 and 6 year old girls are still keen to play with the dollhouse that we have, and it's good for our younger boys too. I will say though, that at 6 our older DD is starting to drool over the fancy architectural dollhouses with lots of details. Our girls are at an age where they are fascinated by tiny miniature things.
If you have or expect to have younger children in house, or if your DD is under the age of four I'd say that it's a good dollhouse to consider. If your DD is closer 5 or 6 you might want to look at something fancier.
It is a good deal for a furnished dollhouse. The Plan Toy house plus the accessories cost us $350, though we didn't buy everything at once.