I was just going back in the vault and found this thread. I don't know if it's atypical for a regulator and plastic check valve to hold up for 15 years, but I can't say how pleased I am that they have.
I (and may of us) take this site for granted, but where would we be without it? Seriously, I wonder how the hobby has advanced in the past two decades because of the internet. My tank would be a mess of algae....end of reminiscence.