She's a lovely personality with a beautiful voice. Live, she's wonderful.
On the less positive side, I don't think that she comes across as well on a CD, perhaps because there is a tendency to a certain sameness in treatment/sound. Not the first singer about whom such comments could be passed, of course.
She has been criticised for her arrangements of certain standards - hence a few jokey comments about Folk Police in her act! Some of the hoarier male shanty singers dislike her Ranzo - I think the original will survive. However traditional a stance you care to take, her treatment of other standards such as Arran Water and Recruited Collier is immaculate.