For starters, the LEGO Creator houses are awesome. They are well constructed, can be built 3 different ways, and have a lot of neat features. This set fits that bill. The reason for it's somewhat strange name - 'Apple Tree House'. That is because there is an apple tree in the yard. :-) The name had me scratching my head until I built the apple tree.
I got this set, among others, for my dad. He's in his 70's and can't get around like he used to, but he really enjoys building the Creator houses. Based solely on his experience with the construction I believe this set is a little more difficult than some of the others, even larger sets which he has built. The main reason is because the roof over the garage is a couple of bricks lower than the main roof. This really confused my dad. Also, LEGO instructions are difficult to follow sometimes. This doesn't take much away from the set. It is pretty much as fun as all the other sets and almost as pretty.
It has several really neat touches - satellite dish, basketball goal, lawn mower, and of course an apple tree. :-) It even has a downspout and outside spigote.
My dad said it should have came with a vehicle to pull into the garage.