I have done a few overnight butt cooks the past couple weeks since I got my egg. All were in the 7.5-9 lb range and I only set my alarm to wake up and only check dome temp through the night. Each of these cooks typically took 11-13 hours so I never checked internal temperature during the night.
This past week I ordered the Maverick et732 with an amazon gift card I won in a sales contest. I put the 8 lb butt in last night around 9 pm, got my temp steadied at 275 and expected it to be done around 9-10 am and ready for our 1 pm lunch. I set the maverick to alarm if dome temp went outside 225-325 range and if the meat temp went above 195. At 3:45 am the Maverick went off, I figured temp was out of range but IT temp was already at 195. Without the maverick I can only assume this butt would have cooked about 4-5 hours too log and been ruined.