And here is my two and a half cents,
Although I've never owned a "real" Newf, I have Cabeza. He's part Newf. And, from what I read and hear, he has the perfect Newf personality and temperment, so I feel qualified to comment.
Cabeza is quiet, snuggly and well...perfect
. Seriously. He has been the most perfect dog I've EVER met.(and I have met MANY) He has the personality of a wise old sage. He allows children to flop on him and pull his ears and tail and if he gets uncomfortable, he just shifts or moves. Never growly or aggressive. He's aloof with other dogs, not really interested in them at all.
Have you heard of the book, "In the Company of Newfies" by Rhoda Lerman? If not, you should definitely check it out. Rhoda is a breeder in New York. (BPO's Landseer Cowboy is one of hers) Its a beautifully written book that details the personality of a Newf. Its just a beautiful book. I'm sure you can probably get it at bookstores, or you can order it from Rhoda's website:
www.blueheaven newfoundlands. com The cons, well...drool. Hair...and health problems. Definitely do alot of looking into that. Cabeza doesn't drool for the most part, but most Newfs do. He does have the hair, though! hahahha! We've also been blessed with zero health problems, but once again, he's a mix...
Anyway, good luck, and I'm glad you're looking into Newfs and asking questions. I personally think that they're wonderful, and after the Saint that will be coming to live with us in June, a Newf is going to be our next dog as well.