The Mini 14's are very good light carbines, within certain limitations. Generally very reliable, lightweight, easy to carry and use, but no great shakes in the accuracy department. Standard Mini 14 with open sights would regularly give me 4" groups at 100 yards. Mini 14 with scope gave me 3" groups at 100 yards.
There are probably some good gunsmiths specializing in Mini 14's out there, and improved performance could probably be had by those willing to spend the time and money. I wasn't, and since the Mini 14's filled no particular role for me (not sufficient for large game, not accurate enough for smaller game, no more useful than my M1 Carbines for defensive use) I decided to let them go.