I get 3D Printers (and other items) in for review from time to time.  So far, I’ve reviewed several 3D Printers and some Filament.  Not all printers that I preview, get reviews.  If the printer is severely broken I’ll give up on it (that has happened once).  Others have problems but I have not had time to really troubleshoot, but plan to eventually.  

Makerfun 3D Reviews

Makerfun 3D Preview/Live Builds