I like how easy it is to use as well! It's very intuitive for anyone who has experience in CAD software since you can figure out where everything goes pretty quickly.
There are some things that could be improved by adding more features or making them better/easier but nothing major so far (although they do have other products). If your looking into using this product then just go ahead and give it try if there aren't any problems at first because once used i think users will never want anything else again. Using BIM models of buildings we were able to see what was going wrong before building an actual model which allowed us time management wise rather than having our hands tied up waiting until construction began.