I used the Wally World stuff on my last smoke. It doesn't last as long and there was a lot of ash, but other than that it was pretty good. The temp was pretty much rock solid once it got up.
I hear it differs though. My friend told me they get all of their stuff made by different people. I'd say give it a shot, but have a bag of the dependable stuff nearby just in case.
Oh, and if you are using the brinkman "vault" as I call it, be prepared to go check on it pretty much every hour. That thing is nowhere close to air tight.