The best thing about this program is its ability to generate 2D drawings from 3D models, which makes it easy for me as an Architectural Draftsman to create working plans for my clients. I have used other programs in the past but they are much slower than QMOS. It also has some very helpful features like creating sections, elevations and details directly within the model itself. Overall, I think this product works well once you get used to how it functions. If you're looking for something simple, look elsewhere. However, if you want a reliable, fast tool to use when drafting or designing, then give this one a try! This program was developed by someone who understands what we need as Architects & Engineers. They took our feedback into consideration while developing this application so there's no reason not to buy. We've been able to cut down time spent drawing up projects significantly.