I sometimes use lump too. Our local firewood house sells mesquite in 40lb bags for $10.
But for someone like myself who produces mediocre bbq it makes no difference to me what I burn as fuel. They all come out ok....:)))
Charcoal to me is convenient and reliable so I use it a lot.
I only use lump wood charcoal when I am BBQ smoking, I buy it from Makro (like a Costco) restaurant quality costs £10.50 for 12 kilo's inc tax or $17.3 for 26.4 lbs, I spend some time fondling the sacks so I get a sack with a lot of big chunks in it so you dont need to top up as many times.
but it's the look on your face as check for larger chunks, shall we say, that scares children and upsets other customers..
in nomine patri, et fili, et spiritus sancti.