As a former user of autocad 14 which I found easy to use I was pleased that Rhino has s similar interface allowing me to be drawing in 3D comfortably after about 12 hours of looking thru the included help file to locate the commands. The drawing commands are 1 mouse click from the left toolbar, and the surface and solid command menues are 2 and occasionally 3 mouse clicks. There is maximum availability of screen space unencombered with tool ribbons in the drawing area. The loft command where you draw airplane wings and car bodies as an example is really wonderful, and can be easily tuned as needed. I have used the edit/rebuild lines command on lofted curves with consistantly good results on the boolian commands. I have called the software developer Robert McNeel .com and talked to their tech department befor buying the software and was impressed with their ability to explain the software to the rest of us.
I bought it the next day from Novedge.com at a cost of $778 and would also reccommend them as the vendor.
I am using a 1.8Ghz AMD processor desktop with 1Gb of ram running windows XP which may be a little light on ram which I hope to update in a few months.
I am a retired construction worker and engineer and use this software for aircraft design. It does all the hard to do stuff effortlessly.I use meshcam and EMC2 for the CAM software and some free downloaded FEA which are not included in this software or autocad or solidworks either.Rhino also has parametric modeling which is used to streach, nudge, and poke a shape into a different shape.