Until Boas win the Europa league or the Champions league he's nothing special in my books. It's not it is a hard thing to win the Portuguese league when you have the best and the richest squad.
It's his well documented preparation method and 17 years experience at age 33 that's definitely worth a shot. The Porto record is only a more comforting fact, compared to everyone Marotta has us linked with. Save Deschamps, if at all that's true.