A couple of pieces of BBQ for a few hours, the cooler works great, particularly for travel. But this is just easy and purpose made for what want it for.
With the offset, I don't cook overnight; for that, I break out the WSM and go to sleep. So if I get a long cook done at 10 pm and want to hold until the next day for lunch or dinner, I can either cram a brisket into a crockpot on warm (works well, but it's a tight fit), put it in my oven on warm, but the warm setting turns off after 3 hours, put it in the cooler, but that's not usually a 15+ hour solution and I end up stacking food on top of other food with plenty of juices in the bottom of the cooler by the end of it.
I've gotten to the point where I'm cooking for medium sized groups enough times each year where something easy that holds a lot of food (and I don't have to raid the linen closet for old towels) just makes sense, particularly for the price. Honestly, just being able to crank out and hold the sides for Thanksgiving has me kind of giddy about this thing.