I'm not a rotary fan, so when I got my vice I didn't want a rotary feature.  I have an HMH and couldn't stand it.  It is a backup vice if I need it (I haven't yet) or a travel vice if I take one with me (haven't taken it anywhere yet).  I have the Dynaking Professional and wouldn't trade it for the world.  The cam lock is the best locking mechanism I have tied on for hook holding and ease of use.  Every time the lever goes down, the hook doesn't move.  Not cheap, but I'll never need another.
 
thanks,
rick