I used Kingsford briquettes for the longest time on my Backwoods Party. It certainly lights easily, burns evenly and is easy enough to manage....but the amount of ash it produces as it burns is a problem.
Unless you regularly shuffle the briquettes around, they build up enough ash to stifle the fire. In my older backwoods party, the fire pan has no grate, which meant a lot of fire maintenance, trying to separate the ash from the burning charcoal every couple of hours. What a pain in the ass and what a waste of charcoal (because you can't separate the small burning bits from the ash). I eventually switched to a BWS Fat Boy with a fire grate, but ash continued to plague me.
Even worse for me than the fire maintenance issue was ash in the cooking chamber. I'd get quite a bit of ash carried in with the heat and smoke via convection. It would get so bad sometimes, I'd notice a significant layer of ash on top of anything wrapped in foil in the cooker. What wasn't wrapped didn't look ashy, but the moisture in the food must have been absorbing the stuff. Yuk.
Now I'm using lump. I tried Cowboy (because they sell it at my local supermarket) and as everyone else has said, it sucked. Now I'm using Wicked Good. It burns really evenly and slowly (although it takes a lot more to get it lit then kingsford), and I don't notice any more ash in the cooking chamber. The stuff is great, probably even worth the price and the amount of tiny bits and dust I get in each bag.