SGC has the best slabs and does the best job at actually grading cards IMHO. They are beyond horrible at everything else.
As far as posting on here in my personal experience it works WAY better than contacting/trying to contact them.
I wanted to make a fairly big submission that included a complete set and around 50 additional cards a few years ago. Had nothing but problems with their shit show website. Complained about it on here and BOOM got a call from Matt at SGC and problems got taken care of.
