Did you pick it up from a retailer or have it shipped to you? - Got it at Home Depot.
Sending it back would cost a small fortune plus you would have to figure out how to get it back in the box. - Home Depot put it together for me, I don't have a box. Also, I have a 1 year return policy.
I'm surprised you don't wait to hear back from them before making a drastic move. - I have already spoken to MB. Their troubleshooting implies all parts are functional. However, it doesn't have a way to test why it shuts off at exactly 350 degrees each time.
I know there's a software update available, perhaps you should install it first? - Confirmed it's the latest update.
I think you should at least give them a chance to offer advice on how to correct the flaw. - I can choose to return it. MB wants to have pictures and a whole process to prove it follows under warranty or if it's somehow not their fault. As long as I'm within the return period It's faster to just drop it off and pick up a new one.