I've used Sketch Up for a short wile, and it did get me interested in 3D modelling, but ultimately, the models it creates require too much work to fix to get them to print properly.
About a year and a half ago, I needed to have some injection molded prototypes made for work and found that no one wants to even consider your SketchUp designs for prototyping. You need to provide either AutoCad, Inventor or Solidworks files.
So I started to learn SolidWorks. Frankly there's no comparison, once you start working with Solidworks, you realize just how primitive and lacking SketchUp really is. I haven't looked at SketchUp since.
I know it appeals to many, but that's probably because they haven't been exposed to something like SolidWorks.
To print or, 3D print, that is the question...
SD3 printer w/too many mods, Printrbot Simple Maker Ed., FormLabs Form 1+
AnyCubic Photon, Shining 3D EinScan-S & Atlas 3D scanners...
...and too much time on my hands.