Only too eager to reply to this one.
I had an old used SM008, predecessor to the SM009, and I too had real estate envy - needed larger shelves, wanted the additional temperature levels available that the SM150 offered.
I found mine on CL, it too was a long drive, but I went there, we plugged it in and I hit the Brisket preset button and the display did show the temp (at first only 100 degrees (as designed) and cook time remaining (12 hours). Shut it off, then hit the chicken/ribs preset and watched it setup correctly.
This smoker had been in a ribs place that failed, the owner joined a volunteer fire department and they used it like crazy at the firehouse. But as another poster said, they are commercial units and are meant to run 24/7 for years. It's now a couple years later, I have not had a speck of trouble with it, last year I got stainless steel shelves and it's the best. I can easily do half a dozen slabs of ribs, some chickens and a pan of baked beans all at once. I have a beach umbrella attached to the railing behind the smoker so even in snowy weather can do a cook - this one was a mexican style pork butt for carnitas, it was great !!