Hi Mark!
I went from using a Klose offset to a WSM. Now I own an AmeriQue. The temp stability is outstanding just as Hook says. Mine never varies by more than a couple of degrees. I've done butts, ribs and chicken and the meat comes out tender and moist with a nice smoked flavor.
The Amerique holds a lot more product than the WSM and is not nearly the fuss of the Klose offset.
It is very economical as well, using only 1oz - 6oz(s) of wood and minimal electricity.
I definitely would recommend the AmeriQue and as SmokinOkie told me, "you can now concentrate on flavors and technique."
John