Having had Weis for over thirty years, I would say that, as long as you have chosen the puppy carefully and it's from a good litter with sensible parents, they are no more difficult to deal with than any other breed. Yes, they can be stubborn on occasions and are definitely one of the more clever breeds - they are gundogs after all - but having said that, they love to work - whether it's showing, agility, working trials, just basic training or, of course, ideally working game and if you can fulfill that need, they make wonderful pets. Whichever 'product spec' claims they are 'hard to train' doesn't know what they're talking about - more like the author doesn't know how to train a dog! They love their families beyond anything and are extremely loyal. They only bark (or chew) excessively if left on their own for hours on end and it's all down to the effort you, as owners, are prepared to put in, like any dog in fact.
They do need regular exercise but it's a myth they need hours of it. If you overdo the exercise, all you get is a super fit dog which then becomes hyper if you miss a day or two - very much like a thoroughbred racehorse, in fact. What you want is a pleasantly healthy, 3/4 fit riding horse !
I don't know how old your son is, Melendez but if he's around the 10 yo mark and really does want to have a dog, then you could do an awful lot worse. If you are prepared to encourage your son and let him take his pup to regular training classes so he can be taught alongside the pup how to be a good owner, then likely he'll have 11 - 14 years of tremendous fun with his dog. My own son had his own Weimaraner when he was ten, he helped train her alongside my others but didn't want to show her himself - I did that bit! But even so, Connie always knew that Giles was 'hers', even when he went to boarding school. Minute he came home, she was his shadow. She died three years ago at the grand age of 14 and I know Giles still misses her, event though he's long grown up and left home! He's biding his time til he has his own home and can have his own Wei, as once you've had the breed, you'll never look back.