I used lump for the first time yesterday...the smell was very pleasant, it light up easily and had my temps holding around 250 all day, the only issue that arose was when I had a temp spike (lid off mod) and I left the vents closed for too long and the fire went out, the butt was at 180 so I just tossed in on the oven to finish it off. Oh and after 8 hours or so it did not even look like I had use up any of the lump! I was very impressed. Its like anything else, I now need to practice using lump and I have a feeling it will be my fuel of choice. The was in a UDS and using Kroger Brand Lump.