I have read the reviews on the Brinkman. Let's just say I didn't buy one because of that.
IIRC, some people found the unit to be hard to use. I had a way old version and I had a lot of trouble keeping it going beyond 4 hrs no matter what.
Google "brinkman bullet" and half the first page is how to modify the thing. Like this one:
El Cheapo Brinkman a.k.a. Bullet Smoker Mods
Don't miss the links on that page, that's where the real info is.