I have a Mini 30 in stainless and had a Mini 14 in blue.
The Mini 30 is a cute little rifle to keep in the truck for when working around the farm. It isn't exactly a tack driver (by a long shot and then some) but for a decent little shooter that doesn't cost a whole lot it suits my purposes just fine.
The Mini 14 I had was the single biggest piece of junk I ever owned, including the 1965 Ford Fairlane I got from one of my uncles.
On a good day it would group less than 10 inches, most days it was just the horrible trigger, regular FTL, FTF and FTE that would get ya down. Fit and finish was crappy in every respect. I sent it back to Ruger twice to be fixed. Then a new problem would come up.
I traded it for a lawnmower and a 10/22 that has been a great little shooter for many years.
As far as mags go, the best I ever found was the Thermolds. PMI's were pretty good, but the Mini would still jam with them in it on occasion. The Thermolds worked great, every time, but the gun had more problems than I wanted to say grace over.
I personally would pass on a Mini 14, but many folks like them. .223 is cheap to shoot too. I bought the Mini 30 because 7.62x39 is even cheaper to shoot and it was available in a stainless.
Good luck with whatever you decide
BigSlick