About Robert bergman seeds

Has anyone use these seeds from Robert Bergman. got some recently was just wondering if they are legit good potent strains from.this website i ordered from . Has anyone or anyone grow from here before thanks .
I grew his White Widow 4 years ago. I think his genetics are good but his seeds are overpriced, and TBH I've read a few negative posts recently on his own forum but I don't know how true any of it is? Maybe go there and check it out?