I like Alibre. -a lot. In the past several years, I tried at least a half-dozen of the big name CAD programs. I'd spend 4-5 days doing the tutorials and interactively using the program -And I got nowhere. This was with the full-demo versions of SolidWorks, AutoCad, Pro-E etc. Also purchased AutoCad thinking it must be fairly easy to use. Nope... BTW: I'm an electrical engineer in real life so, complex programs are nothing new to me.
I tried the demo version of Alibre, watched 45 minutes of online tutorial videos and two hours later was making simple parts. Liked it so much, I got the professional version. Here's something I made tonight in a couple hours. I've only had the program a couple weeks -but admit burning the midnight oil, mainly because it's fun and addictive. This is the first CAD program that ever struck me so well.
BTW: If you click the PDF image, you can use the mouse buttons and scroll button to move and 3D rotate the image. Some of the clone versions of PDF readers don't handle it too well though. Use Acrobat Reader.
Ray