Hi, my name is Joe and I cook in a barrel. In fact, I have cooked some of my best BBQ in a barrel.
I have used a modified Chargriller Outlaw with SFB offset smoker for about 4 years. It is a big fat cry baby. Every 2 hours you have go care for it and feed it. It cooks some good Q but it is a lot of effort and forget about running any errands while slow cooking. You just couldn't leave it alone for very long.
I spent about $150.00 completing my UDS. It is a hands off cooker. It holds temps steady as a rock for hours. Many like the taste that you get from the fat dripping in the coals as the meat cooks. Many do not like it. With the UDS, you can use either method. If you don't like the grease hitting the fire, pick up a $15.00 clay pot tray from HD and put it over the charcoal basket. Problem solved.
The UDS is fun, inexpensive, and extremely simple to operate. If you have $400.00 or more get a WSM, a Bubba Keg, or a BGE or a FEC. If you want to make BBQ that's just as good as what you can get out of one of those with comparable capacity to a XL BGE or 22.5" WSM but want to save some $$$, a UDS is a great way to go.
My gently used impeccably cared for Chargriller Outlaw with the SFB is going on Craigslist. Between my Weber SS and the UDS, I have all I need... until I get a Jambo. ;-)