We use Creo at my day job, I haven't touched it since the Pro/E days. I didn't like it, not one bit. I do my best to make sure any modeling work is done by the temp guys. I futz around with the shrink wrapped JT models, and that is it. I really don't like Pro-E. That is with the corporate package with every whiz bang add on and many of our own custom programmed add-ons you can imagine.
I tried Google Sketchup, the free version is not worth my time and effort, it lacks critical features to make it engineering useable. Supposedly the purchase version unlocks those required features, but now I don't trust it enough to spend my own money on it.
I have no practical experience with Solidworks, but always hear positive reviews of it.
I bought Inventor for my side business use, I find it very easy to use and like it a lot. It was a coin toss between Inventor and Solidworks, but I learned Inventor in school and decided to stick with it. Let me know if you want me to sketch something up for you.
7.5x55 Swiss in a custom design mag. Inventor 2014
