I have the 008 and after the initial shock at it's size, or lack thereof, I have grown to love it. It's all about how you really cook, not how you think you cook.
I have had 4 butts in my smoker at one time, about 40# worth. It was full. Totally full. But it is rare when I need to cook that much. A normal cook for me would be 1 butt and several racks of ribs, which the 008 can do easily. Or 1 butt and a brisket, also easily handled by the 008. I cook ribs laying on edge BTW, so really I think I could get maybe 8 racks on one shelf if I tried.
Think in terms of how much you might need to cook to serve a party for 25 on a Sunday afternoon. Here's an idea:
***Starting Saturday night @ 10:00, put 2-10# butts in cooker at 225*. Pull cooked butts at 190* @ 9:00am Sunday. Foil and cooler.
***Put in 9 full racks of ribs(3 cryo paks from BJ's) at 9:15am. Pull them out at 12:30pm, foil and cooler.
You could stop there and start to eat, but you could also:
***Put in 60 wings(more if you have 5 racks) to smoke for about 1 hour, or 6 chickens cut in half for about 2.5hrs. If you do the whole chickens, you'll be pushing the time I would want to hold the butts/ribs just in the cooler, but you could hold them in a low oven while the bird cooks.
Worst case is that you sit down to eat at 3:00ish with 27-1/3racks of ribs, 24 chicken quarters, and about 12lbs of pulled pork. That's a pile of food for 25 people!, and it all came out of an 008. Assuming you did beans, potato salad, and slaw in house, you actually just cooked enough for about 50 normal people. Or me and about 10 of my friends.
It's all about planning. And even in the above scenario, you haven't been standing around tending the cooker.
The only cavaet I can offer is that I have not had ANY problems with long cook times in my 008. I've had no thermostat problems, heat problems, or any other kind of problems with my 008.
Butts are dead on reliable to cook at about 1hr/per lb. or maybe even a bit less. I never open the door though, and I stick now to one meat supplier that is very consistent in product. I have seen variations with other butt suppliers that added as much as 20min per pound, so watch your meat.