I’m working commonly with AutoCAD and sometimes with Pro/ENGINEER.
I downloaded the trial version with the intention to test the hybrid 3D solid and surface modeling (this ability interests me) announced in brief in your product introduction.
Because of my work, I didn’t have enough time to achieve this goal and the time allocated for the trial test has expired too quickly. I didn't re-download the program. I suggest you an amendment of the philosophy of trial to offer a longer time for testing. The reason is that a correct testing of a program with the complexity of Cobalt claims more then the actual duration.
However, between my daily tasks I performed same constructions in 3D solid version and I appreciated momentarily the comfort of the program interface use.