Am a newbie with firearms. A 597 is my first rifle. Consider that trigger pull is really heavy so an hammer improvement is really needed. Either the commercial Volqartsen hammer or the Jard trigger update which is much more expensive (makes you wonder if it is really worth it on a <200$ gun).
Also consider changing the extractor to a Volqartsen one. So you have to consider the extra expenses too. Once that is done you have a pretty accurate rifle though.
Also stripping down the rifle for cleaning is a bit complicated... something you should do when you are not in a hurry
Watch docv73 videos on youtube to see more on modding the 597.
I had no problems with the magazines (10 rounds). I have the metal ones with the '10' in a circle. Should be latest version with the magazine issues fixed.
Probably more defects can be found on older models. Mine was made in 2009.