I am getting pretty excited to make mine.
I have been smoking for the last 10 months mostly with my 22" OTG (although I also made a mini-WSM). I've gotten pretty good with the OTG, but it still takes a bit of babysitting to get and keep the temperature I want, particularly with longer cooks. I can only imagine how much easier it will be to maintain temperatures for a long time with a UDS without the need to babysit it, constantly adjust vents, add water into a water pan, add more charcoal, etc. I bet it will also be far more efficient on fuel too.
22" OTG; 22" Performer; mini-WSM; Brinkmann gasser; UDS (on the way); Maverick ET-732