The Espace Killy region is made up of Tignes and Val d’Isere, which between them boast 170km of beginner runs, so more than enough to keep you entertained for a week. To choose which resort to reside in will purely depend on your personal preference.
If Val d’Isere is Cinderella, full of French charm and beauty, Tignes is comparatively the ugly sister. But while the high rise apartments of Tignes might not do it for you looks wise, bear in mind that it’s a cheaper option than Val d’Isere.