Not folk music in the traditional sense, but acoustic music with an occasional rock and roll feel, a slight jazzy/blues tint and with a few tracks veering towards seventies pop and rock.
I've heard a bit of Magna Carta before and find it occasionally a bit twee, but this compilation is very varied and highlights the eclectic nature of the band. Occasionally it is breathtaking, especially on "Highway to Spain" - the 2nd CD is mainly tracks from the 1980s/1990s, but the addition of period synths can't dim the wonderful melodies & lyrics. You'll be humming Airport Song for months after this.
A real gem of a compilation.