In my experience they are NOT like Labradors. I have some in my obedience classes and I see them at shows regularly. They are more vocal/barky than most well-bred Labs, and seem more independent (and the ones I know seem a little stubborn) and less likely to view everyone as their new best friend like a Labrador would. Also, they require more grooming than a Labrador -- either by their owner or via regular trips to the groomer. Your friend should check out their parent club site: Home to see if there are any breeder referrals for her area or any local PWD clubs near her. Talking to reputable breeders would be a good place for her to start. Also, a lot of people want to get PWDs and similar because of allergies, but the dogs may still trigger allergies. Per their parent club:
"Portuguese Water Dogs are considered to be hypoallergenic because they are single-coated. To be "hypoallergenic" is to have a decreased tendency to cause allergies. There is no such thing as a non-allergenic dog. Hypoallergenic dog breeds (single-coated or hairless) will still produce allergens, but because of their coat type will typically produce less than others. People with severe allergies and asthma will likely still be affected by a hypoallergenic dog.
If you have severe allergies it is suggested that you spend time with adult Portuguese Water Dogs before getting one. Many people are allergic to Portuguese Water Dogs, so please be careful. Spend time with the breed before bringing one into your home as a family member."
Since the Obamas got these dogs, some more unscrupulous breeders have popped up to capitalize on the non-allergenic hype, so your friend should research, research, research!