The SHV F1 is under rated, but I guess it doesn't have the higher mag and bells and whistles of the newer chinese competition that everyone wants now, it is an older design after all.
I've got a fair bit of time on the SHV F1. The main limitation in my opinion is the FOV. It's quite noticeably narrow. Everything else is really good. The turret clicks are muted but clean. Zero Stop is easy. Mil-XT reticle is a new option so reticle is good. I have the Mil-R which was ok. The SHV won't let you down, but it wont blow you away either.
My only concern about the Mk4HD is the reports of QC issues, but that could just be overstated on forums.