This CD is perfect, both as an introduction for those who've never heard any Karl Jenkins before, and also as a representative selection of his best work, all on one CD, for those who've become hooked, as I have.
Karl Jenkins' music isn't always easy to listen to on a first hearing, but it grows on you. Having listened to this and other recordings a number of times, I find myself humming his tunes to myself throughout the day.
"The Essential Collection" includes four pieces from "Requiem" and the four most accessible movements of "The Armed Man", together with selections from other works, such as the 1st movement of "Palladio" - which made me go out and get the "Palladio" CD, which is very beautiful.
Three of the pieces included on this CD were used in TV ads and so may already be known to you, even if you think you've never heard anything by Karl Jenkins before.
Definitely "essential" and definitely worth buying.