Comments: We wanted to create virtual spaces for an application of a client who wanted to make a 3d space of a building he was going to make. We did the job and it was very good. It just tooks us a little more time that we were hopping for. Great tool really, but since it's very customizable and precise (which is good), you can take a lot of time moving things.
The software is easy to use and to manipulate once you get the hang of it. You can create 3d spaces to represent structures to be created on real life. So anyone on the project can understand things better and avoid having mistakes.
It's fast to make prototypes, but it's not so fast when you want to manipulate textures or materials on the objects from the scene. More if you are someone who really takes it's time to make things perfect.