@SherryCobySam, if the food in the APO is inside a sealed bag, I would expect the APO steam function to make no difference to the bag contents. I understand that with the APO one can cook sous vide without plastic, but I've only cooked fish a few times that way, so not much to report.
After a period of time, the APO will warn that it wants you to run a descale cycle. This has occurred twice or thrice for me, once it launched automatically (unfortunately) when I was in the middle of cooking something. Someone convinced me about using distilled water, by saying "Do you really want to replace the whole oven because you didn't use distilled water?"
@EatingBen asks about our satisfaction with the Anova Precision Oven. I have no other experience with a steam oven, but I'm enjoying what I've learned with this machine. I've closely followed the discussions about Cuisinart Steam Oven for years. I knew that many folks thought the CSO too small. Recently I heated up a 7 quart enamelled cast iron oval brasing pot in the APO at 220°F. Fit fine.