Looking at the product video, I don't use it but I do something very similar. Making the shape of a house and walls is not hard, what is hard is having all the assets to fill the house with, things like decorative door frames, furniture, nicknacks, etc. If you can't 3D model, they have their own collection for you to use, which is great. I get most of my models from blendswap or make my own, but the overall idea is, have a collection already made, so when you want to put a house together, you are spending most your time decorating (the fun part). I myself use Blender for everything. that and I like to play with cool lighting effects, which I don't think you can customize with the above software.