We really haven't noticed any significant oxidation over cook times of up to 4 hours; We have not yet tested something like a 72 hour recipe.

We do plan to have public demos from time to time (we've already done a few at various meetups and other events -- we're based here in SoMa). If you'd like, email info >>at<< cindercooks.com, and we can add you to our mailing list so you could be notified of these events.