I think Randall maybe telling some tales.... there were some isolated reports of issues of 3-12x50s with MTC knobs that issues but I am not aware of any with DT knobs. Regardless, when one stacks up all of the S&Bs that Premiere converted 3-12s, 4-16s, 5-25s - I think there were very few problems. Alot of folks on the Hide own them and it has been extremely rare to read about one that went TU. NF also has a pretty good rep for being problem free and generally a good optic.
The thing that I have come to learn is before one should accept someone's claim of "this is really good" you personally need to field it in all kinds of light and conditions. Most folks really don't have much to gauge it against or just want to say it is good b/c they own it.
Good luck

