I did it! Using Azenjoy's link,
http://www.seriouseats.com/2015/07/the-food-lab-complete-guide-to-sous-vide-chicken-breast.html
Starting with an bone-in chicken breast with skin, I seasoned, bagged, and refrigerated the breast. I used LOTS of salt and pepper, a slice of lemon, and a clove of garlic.
There were no directions in the appliance's box. I was instructed to download an app, which I did. Not terribly helpful to a total newbie, it had the same info as the website. Still no word on how big (the key word is "deep") the pot should be, and how many pieces could go in a bag at a time. The first pot was too shallow.
I transferred to a much larger pot, and because the water was taking too long to heat, filled the second pot with hot tap water. So, we are starting at about 125 F. I waited, and waited... The temperature is going down! Finally I discovered that I had to push the start button again or a red arrow on the dial to circulate the water. Now it began to heat up. Duh...
It didn't take too long to get to 140 degrees. Maybe 15 minutes.
Could not for the life of me figure out how to get the app to time the cooking. Eventually I eventually found the setting, but well after the entire meal was cooked. The temperature dropped a little when I first immersed the bag, but ignoring that, I started timing. The bag was clipped it to the side of the pot to keep the agitator openings clear.
After 1 1/2 hour, instructions to pat dry, debone, cool, and grill the chicken were followed. It looked awfully raw to me, but then again, I won't taste meat unless it is burnt. (The 4 kitties get the meat off the bone, so no waste. ;D )
After 6 or 7 minutes on the grill (2 minutes longer than advised), it was ready. I will probably use a higher grill setting next time. I like browner.
My husband absolutely LOVED it. His one comment was that next time he would char it on both sides. (What can I say? I've spoiled him to prefer medium-well to well-done meat.) Nevertheless, it was very juicy and cooked through. It reminded him of food we are served when we eat at the local Community College culinary arts restaurant. (But they don't sous vide; I asked.) Not a meat-eater, I had one small bite and found it very tender.
Over-seasoning worked very well. The saltiness permeated throughout the meat. We love salt in this house. The lemon slice worked well too. The garlic clove could have been reduced. Next time: cook a little longer, maybe on the grill; two slices of lemon and half a clove. Or some other seasoning. And definitely burn that skin!