My experience with boneless chicken breasts or thin pork chops:
In 1 hour, you got jerky.
I have never smoked these again. I go for those big honking Hooter type bone in chicken breasts, then bone side down, low and slow.
"Boots and Pants and Boots and Pants and Boots and Pants..." - Maxwell
Bandera, M-BGE, WSM, Gold Kettle, Kenmore Gasser, 36Qt Turkey Fryer, ECB, Dutch Oven