I would not say they are good. I would say they are excellent. Is it a utility knife? No. Is it a collector's piece? I don't know. Is it a well designed, built, and effective defensive knife? Yup, for sure.
All those finger grooves on the handle make for a very secure grip, no matter what part of the handle you are gripping. No slipping!
The lock is strong enough. I've done full power back snap-cuts with the Sifu in to a wall mounted target (meaning solid), and the lock never noticed. Mine is smooth enough to flip open.
And the blade. Well, it is big, curvey, and sharp. What more do you want?
Is it better than a Tacquero Grande? I don't know. I trust the Rolling Lock a lot more than a lockback on a blade that size. The Sifu is a little more versatile in terms of point presentation, in my opinion. ATS-34 blade with no unsharpenable teeth. Yeah, I like the Sifu better. But that's just me.