i agree 100% with the post above - it is NOT for smoke-cooking food or bbq, but it was designed for works very well for things such as sausage, cheese, jerky, nuts, chipotles and basic smoke flavoring of any food.
as long as you remember what it was designed for, it is excellent. just like anything else, if you try to use it outside its desgin, then you will be disappointed.
i've got a .pdf of the insturction/recipe booklet. if you'd like a copy, let me know or send an email.