I have been using this...

h_najmi verified customerCanada3 star
I have been using this component for more than two years now. The component itself is powerful and rich. However, when it comes to documentation, help and technical support it only compares to the lowest quality software I have ever seen. Basically, you are on your own using the fairly complicated tools. If you have had experience working with AutoCAD programming (specially .Net) that knowledge will help you to quickly get used to the object model in this component. Considering the price tag you pay for the subscription you expect a decent documentation and technical support which does not exist at the moment.