I cooked a 12 lb'er today on my Big Easy. Small bird caused it to get away from me, and final temps were 175 in breast and about 185 in dark meat,(thickest part of the thigh), and total cook time was 1 hour and 33 minutes. The result was still one of the best turkeys I've ever cooked, let alone eaten.
It was very flavorful, moist and tender. I used a pre-made creole hot and spicy butter injection in the breasts only.
I've seen people mention wing tips being overdone. I tried to counter this by tucking the wing tips under the legs. Seemed to work well.
The breast was especially moist and fall apart tender. The test eaters were worried it was under cooked because the meat was so tender and juicy.
Clean up was a breeze, a simple wipe down with a paper towel or three, and I'm all set for the next cook. Next bird will be closer to 16 lbs, as this small one didn't leave me enough leftovers