I've been using the 49ers offensive pb and the NYG on defense and they are both good. I tried the AFC legacy pb and hated it but the NFC one is really good and that's the one I'm using now. Looks like they changed alot of pb's this year. The 49ers have alot of the same plays as last year and the new deebo package and pistol formations. They took away some plays also like all the trap run plays and some strong close plays but it's still pretty good but I might like the NFC book a little better. I'll probably try out a few more ones like the Raiders,NE on offense and I heard the Saints have a good defensive pb so I'll check it out. I've run the 4-6 pb the past two years so im wondering if or when they'll have alternative pbs come out.
