The bullet points:
I have a 22.5" WSM and I love it. Favorite thing so far, pork tacos.
grilled corn tortillas
Worst smoking failure so far, ribs. I just can't get the fall-off-the-bone part down.
I have yet to do an overnight cook, so far everything has been cooked using the foil/high-heat method with some decent results. Looking forward to honing my cook.