I've recently made the switch from KBB to lump.
Last week I did a rack of spares on the WSM using the "new" Cowboy lump (now available for a great price at True Value. Go to the website for an even sweeter deal.)
Prepped another rack this a.m. and opened up the WSM and was amazed at the amount of good fuel left and the amazingly small amount of ash.
I know the veterans here are aware of the reasons to go lump, but I wanted to let the newbies know that lump is probably at least as economical as reg. briq.s, maybe more so, and has so much less ash you won't believe it. So, take advantage of the T.V. Cowboy deal! (Not affiliated in any way, shape or form w/ T.V., Cowboy, or their subsidiaries, associates, families or friends.)
Here's what was left from that earlier cook, which started w/ a full ring and nearly-full lit chimney and cooked for ~5 hrs @ ~280:
Nice chunks and
so little ash.
A few close-ups
Bigger chunks go back in the ring for today's cook
Here's what's left of the reusable smaller stuff
Enough to fill a chimney