I've done it a couple of times, but quit when I realized you should really only brine poultry if it hasn't already been commercially processed.
If you look @ the ingredients, you'll see commercial suppliers essentially already brine turkeys, chickens & ducks.
It was sort of fun to do though, but I noticed my face felt a little puffy after the last one & realized it was fresh farm bought poultry that should be brined, or you get too much salt.