hey has anyone tried the raw marinated bottom round flat corned beef from guy fieri?
No, but I wasn't thrilled by my Costco purchased marinated Tri-Tip. Nothing special and when the marinade dripped away there wasn't much to eat.
Fwiw - I've not tried it, but my favorite corned beef in SF is from Guerra's. Very solid, artery pumped, delicious. Sadly, it outperformed even my home-corned brisket (also purchased from Guerra's).