I have both a SM150 and a FEC100 and to be honest I had pretty much just used the SM150 as a holding oven. Partly because it works so well for that, and partly because I was very happy with the results I was getting out of the FEC100.
Truth be told though, I had not been impressed with the results I'd gotten out of the 150...something just wasn't right. Then I cooked Easter dinner for about 20...did a pork loin and a spiral sliced ham. As usual I ignored everyones advice and instructions and loaded...make that filled the woodbox with hickory. Cooked for about 3 hrs. at 225. I would not have thought you could put that much smoke on a piece of meat. It got eaten, but I was not proud to say that I had cooked it.
Somewhat humbled by the results of my pig-headedness I decided to listen to the good folks here, not to mention the manufacturer's instructions. Last Friday night I loaded the 150 with a couple of butts and placed one 3 oz. chunk of hickory in the woodbox. Fired it up and went to bed. Twelve hours later I pulled the butts at 185, wrapped and held at 140 for a couple of hours. I am not going to say that they were the best I ever ate, but they were pretty dang good!....and had plenty of smoke. Matter of fact I will cut back to 2 oz. next time. Lesson learned!
Lots of good advice here if a person has enough sense to take it