For 79 bucks it was worth a try
I bought the V Burner about 20 years ago and put into a UDS. Its on the 2nd barrel now and the burner still works. Good product. A grill bottle will last just about forever in the UDS running at 250. Yes its perfect for a 10 - 12 hr. cook.
I don't know who I ordered from It has been so long ago. All I can say is that after all these years it works (think made in the USA). I have a Traeger also. Like everyone says you won't get as much smoke unless you run the Traeger at lower temps. In the UDS I have a flat plate about 4" above the burner that I put a muffin pan full of wood chunks in. I wrap the pan tightly with foil and poke 1 hole so the chunks never get enough air to burn which lasts about 45 minutes. Much more smoke than with the Traeger unless you use a smoke stick.