GrabCAD Library is a great resource for finding not only specific products ready for 3D print or CAD software download, but it is such a big database that it is also nice to be able to view and browse files for the CAD files to get ideas from an opensource community to make your own 3D model. Review collected by and hosted on G2.com.
There is nothing that I dislike about GrabCAD that specifically stands out to me. Review collected by and hosted on G2.com.