I use RO, since that is what is available. Only other choices here are cowboy lump which burns way fast, bag is full of dust, small pieces, and produces HUGE amounts of ash...other words...it sucks.
Kingsford was great till they changed it up. The newer briquettes have more surface area now with those indents. So now it burns fast and produces alot more ash than the old Kingsford. I wish they would just change back. I am trying to talk some friends in all chipping in and ordering a pallet of wicked good.
I haven't tried wicked good but they have a good review on that charcoal comparison site (i'll see if I can find it), and it looks like my best bet is order bulk online of quality charcoal, unless someoneknows a great deal on great product in the valley or in Flagstaff.