My thermometer usually shows it to be a little hot. Usually when it looks like it should be done we get another thermometer to double check and get about 10° cooler.
I don't like opening it up to check that often. When you're lookin', you ain't cookin'. I think I can plug another temperature probe into my smoker, maybe I'll give that a try.
I've not made that many briskets to see what the deal is with the jiggle test. It's something I suppose I should get familiar with.
It came out good. I wouldn't be embarrassed to share it with family. It didn't pass the pull test, but when sliced it can be easily cut with a fork. It isn't tough or chewy. I wouldn't describe it as dry, but I bet that it wasn't as moist as it could've been.
I was wondering about vacuum sealing some, and when I get around to heating that portion up just put it in the crockpot with a little beef stock. It would probably ruin any bark that formed, but besides that I don't see a problem.