As a pretty new person to smoking (started in the last year), I've found the WSM 22 to be very easy to regulate and get great results with it, as long as I'm using charcoal. If I use lump, I've had issues with high temps, but I think if I gave it a try now I'd be able to regulate the temps. I'd get it and not look back, there is a ton of info on the web about these units, how to use them and the minion method etc.
JMCRIG on here gave me some great info that has really helped me with the minion approach. Using a big coffee can, put that in the middle of your charcoal grate, load the charcoal around it, then when your charcoal is ready in your chimney, dump it in the coffee can. Use some channel locks to pull the coffe can up, complete the setup of your WSM, and you're set for the next 8-10 hours.