I own it. It's fun to play with but ultimately suffers from the same problem that almost every tool in this style does. The resources you get to use are limited to the ones that they've thought to include. If you want to make a jail, that's fine, you can make it work. A tavern? Easy. An ancient Greek temple? Eh, you can get there with a bit of imagination. A bathroom? Sorry, bud, you're on your own.

I've traditionally used Dungeon Painter Studio for my maps, and while it has similar limitations, it has the benefit of being able to import other art, and you get a whole dimension to hide your crimes in. That vaguely bookshelf- looking rectangular thing on the map? It's an armory cabinet in the barracks. Now in the bathroom it's a medicine cabinet. In the bedroom? A wardrobe. You can't see what's in it, can't see how tall it is or how high it's mounted on the wall, so you get to fill in the details with my description. 3d limits your ability to do that because everything looks like what it is. So if you don't have a model of what you're looking for, it's more obvious when you're making do.