If you have already heard the full length "Souvenirs D'Un Autre Monde" and enjoyed it but thought that it's not "Black Metal" enough then this EP may be of interest.
Alcest is famous, but it was only until recently I listened to the band's debut and it's nothing like I have ever heard of before in metal. If you so happen to know the New Age sound like Enya which is relaxing and soothing, that's how I would use it to describe Alcest's music too and I've been told this is called Shoegaze.