I found this page on a search, and became a member. I bought an Orion yesterday at Home Depot ($134, including tax--10% off, military discount). The cooking time was a major selling point, along with the ability to cook multiple items at once.
I read the instructions and put the device together. I smoked some baby back ribs, and beer can a chicken. The ribs were not quite fall off the bone, but pretty darn good. My wife loved them, but she likes a little chew in hers. Nothing wrong with that. The chicken was excellent; one of the best beer can jobs I've ever made (although it is hard to mess up).
Pros: The cooker allows genuine smoking, and it doesn't require a whole lot of intervention. The smoky flavor was evident in the food, and the meat was thoroughly cooked. If you've got a lot of meat to cook, you can follow the first load up with another. I did that with another rack of ribs, and they came out well.
Cons: As has been stated, the cooker can use a lot of charcoal. In my opinion, the fire and forget aspect has its negatives as well. If the meat doesn't turn out like you want it to, you have to pretty much guess what you've done wrong. I actually like watching the meat on occasion.