The turkey breast did fairly well in my opinion. It had a nice smoke ring, and smoke flavor was pronounced throughout the meat, but I made two mistakes...
1) I sprinkled Tony Chachere's creole spice on the skin, and the meat came out a bit too salty for my taste. Next time, I'll use a reduced-sodium homemade rub, or just use McCormick's Montreal seasoning (65mg of sodium per tsp).
2) I injected fresh pineapple juice into the breast. The pineapple flavor wasn't too bad, but the enzymes in the juice actually melted/dissolved the breast around the injection sites. We literally had to wash this residue off under running water. The member who touted this kind of juice as a tenderizing agent for pork wasn't kidding. It actually works - although, I would recommend canned pineapple juice the next time for poultry since canned juice has no such tenderizing enzymes.
I hope this experience adds to the thread.