I like what I've heard so far. I used to ignore her music for some reason. "Hometown Glory", "Make You Feel My Love", "Rolling in the Deep" and "Set Fire to the Rain" are amazing.
Europe definitely Loves her...However, She needs to start making her way towards the United States as she has a Big Fan over here and I'm sure others, Maybe one day she can promote in Mexico, Brazil and Argentina too!!
I heard about her with her last album, but have never really heard '19'...but '21' has turned out to be such a great album now...I can't stop listening to Rolling in the Deep and well almost the whole album...Set Fire to the Rain, Someone Like You, Don't You Remember, Rumor has It, Turning Tables...They're all great works of art and relaxing to hear!