I have one (4 years) and my dad has one (10 years). It is a high quality American made product out of Ponca City, OK. They are pricey but are one of the best on the market for electric.
I typically smoke butts, fish, deer jerky (prior to the dehydrator of course), deer sausage, whole pork loins, and turkeyson it and do not have to use the grill. As for ribs, wings, chickens, cornish hens, and other smaller meats, I sometimes use the cookshack to get them close and then finish them off on the charcoal grill with indirect heat to better create a crisp or bark. I have a smokebox on the charcoal grill too and more times than not, I just use it instead of the cookshack for these smaller items.
You can't go wrong with a boston butt in a cookshack.
BTW, homemade deer jerky that is first smoked for 2 hours at 225 and then put in the dehydrator is ridiculous. And no, I don't share that ****. The only people who get any of it are me, the wife, and any friends or relativesI have in a war zone with their care package.