Bought my new Mini-14 Deluxe (same as the Tactical model, but with Circassian walnut stock) last fall. Zeroed it at 250 yards just yesterday, with a Leupold Mark AR 1-4x scope mounted.
At 250 yards, the groups ran 4"-5" for TEN rounds, and this is entirely adequate for coyotes or home-defense purposes (if "home" has distances that long). It easily stayed within the black bull of the 100-yard smallbore rifle target I was using at 250.
The rifle has never seen a factory load in over 700 rounds. I chronographed my 20" AR-15 against the 16" Mini, and with the same ammunition the velocities were averaging 3097 fps (20") vs 2840 fps (16") with the 55-grain V-max. Quite a difference. I'd expect the same results from a 16" AR-15, of course...it's nothing against the Mini-14.
Functioning is flawless. I sold the 30-round mag it came with, and now have several 20-rounders, plus a couple 5-rounders for bench use. The cost of GOOD mags is a pretty minor item. I'd rather have two or three that actually work, than a pile of mags that don't.
"Any good?" Yep, I'd say it's VERY good indeed!