I just bought it yesterday, actually. It's pretty addicting to see your house going up bit by bit and then filling up insides of the house through the in-house workbenches. I'm definitely enjoying it so far.
There was a tough choice that I had to make and I may go back to previous save and start the house over or just build another house somewhere else. The choice was between an armory or a kitchen. There are other similar choices where you can add on to the three sides of the house that don't have a door. But once you choose it, as far as I know, there's no tearing it down and building another choice. So the armory was only available on one side, but that was also the same side for a larger kitchen so I had to choose. I'm not too disappointed as it's a cool kitchen, but I sure wanted some mannequins. There was another choice I had to make between trophy and storage room (looking for more mannequins). I chose the trophy room and do regret it (no mannequins, just pedestals for stuffed animals).
I would say that it is worth it to buy it, especially if $5 isn't that big of a deal for your budget. I'm definitely enjoying it so far.
My advice would be to, number one, do a little checking to see what the possible configurations are for each house so you have a plan going in (obviously, I didn't) or save before you choose, always a good idea when building a house

, and number two:
Buy all the iron ore and iron ingots. Seriously. Stock up on that stuff.