I don't own one but really like the gun. The only thing I have read on the internet is that some people have had problems with the gun after dry firing the with the magazine out. Had something to do with the mag disconnect. I tried to find the thread on rugerforum.com but can't. Most people seem to only have good things to say about it.
Hopefully someone with some knowledge will chime in and clarify my recollection.
But if you even try to look, and you don't have to try very hard, you can find bad things about every gun.