I've had Turbocad Pro for a few years. They come out with a version upgrade almost every year and I'm scared to think how much I have into it by now. I'm a sucker for upgrades. I have made at least three serious attempts to go CAD and the learning curve is so steep it just wasn't worth it -- to me. I completely understand the benefits, scaling, water jetting, shading, rotation, etc. I'd learn it where I could make some decent drawings and then not use it for 6 months and have to start all over. I wish I had the time to stay proficient and I would switch to CAD but I don't so it's still grid paper and photocopies...