I've a Bradley original, and like the plug and play nature of adding an Auber dual probe. The temperature control is precise and flawless. Not long ago I'd set the programming to go 1 hour smoke, another couple of hours at a higher temperature, and then one additional hour at an even higher temperature. After getting it started, I spent the morning in the hot tub with my sweetie, and when I went out later that day, the Auber indicated that the program had completed - the fish was absolutely perfect.
With that said, If I had to do it over, I'd probably build something from scratch - metal box of some kind for the food chamber, a smaller metal box plus ducting for a cold smoke adapter (using an A-Maze-N tube smoker). If I wanted to make it more like the Bradley, I'd opt for a Bradley smoke generator @ $179