I really wanted to like the 527. I it a beautiful rifle, has sights, and I like the action. I liked them so much I have tried twice with them. My first was a 7.62x39. It was only so/so with surplus ammo and I had problems with light strikes. Magazines were also expensive and hard to find at the time, but the real deal killer for me was and is the safety. I really wish it was forward to fire. I sold this one off and got a .223. After a brief honeymoon, I can to the same conclusions and sold that one as well.
Having said that, every time I see one, I want one. They are a thing of beauty for sure.
I like the Rugers because they have been 100% with Golden Tiger ammo, the safety is forward to fire, they are more accurate than my CZ, and are a better rifle to be beat up in a truck. I was always hesitant to throw the CZ in the truck and head out for some desert exploring. Having said that, I complete understand why the CZ appeals to so many shooters.
I do feel that we are lucky to have so many choices right now.