I've only been at this for a couple of years, so I'm relatively new at this. But just as an fyi for those who've never tried brining a brisket, it's a lot of work, but makes a big difference in the finished product. I make a brine of 1-2 cups of kosher salt, 2 tbsp of whole black peppercorns, 2 tbsp of minced garlic, & 1 whole onion (quarters and separated). I brine the brisket for 6 to 8 hours, depending on size, and then pat dry and use a good rub. Let the meat set with the rub for at least 4 hours until ready to smoke.
The most noticeable difference you'll notice isn't the element of salt or flavor in the meat. That's actually pretty subtle. The biggest difference you'll notice is that the salt acts as a tenderizer. I've been pretty fortunate to have been offered a lot of great advice and so my briskets have always come out very well. But this is one tip I would recommend everyone try at least once. Again, it's a lot of work, but well worth the effort in my opinion. If you don't like it, no harm, no foul. Best of luck!!