I have purchased several products from Autodesk in the past. I got Generic Cadd before Autodesk aquired it and it was an excellent product, so when they came out with Ceneric Cadd 3D, I bought this faulty, buggy, useless program. They promised for almost two years that they were fixing it, then they dropped the product and ended all support. Meanwhile I bought Autodesk 3D concepts for windows...this program could not even be used to draw the example drawings that came with it! They also ended all support of this when they couldn't make it work. When they were beta testing Generic Cadd 7.0 an they discovered it was too powerful and would compete with Autocad they dropped it and ended all support. since this time they have released and dropped a couple more products which I did not buy. SAVE YOUR MONEY if you are not going to spend the money and invest the time to learn Autocad, ...