I can tell ya from usin' 'em, they work great! Only thing is, I dunno if ya really need the beer cans with the water pan. I never did taste any beer flavor, (that I could recognize), even with the beer in such close proximity to the meat! Mebbe something stronger? Wine, peach schnapps, etc.?
In fact, since I really like my chickens sitting upright in the smoker, I'm gonna experiment a bit, see if I can use my beer can stands without the can. Lets the smoke get into the innards of the chicken. That and mebbe some higher alcohol content, concentrated liquids in the beer can....