The Trader Joe's stuff is actually pretty decent. Cooked a 15.5lb brisky this weekend on my BGE-
Put in 1/2 bag (and the bags are small), cooked at 235* for almost 17 hours...and after I put the fire out, there was still about 1/4 of what I started with remaining.
Not too much ash either.
And it's just charcoal with corn starch to hold it together. No other fillers.
Oh- did I mention...it's CHEAP?