I can highly reccommend Grandvalira in Pas de la Casa. Fantastic skiing great for beginers and intermediates, there are some areas which will push experienced skiers and if you are going in a mixed ability group it is great. Never been there when they have not had snow(even when the rest of europe has had little). The people are very friendly and the apres ski is great. Good for families the Andorrans love children and they have areas that are suitable for them. If you like the quiet life then stay out of the centre of town as it gets a bit busy. We always stay on the main street opposite the slopes, great for access great restuarants and very reasonably priced, other countries could learn a lot from Andorra they have consistently kept their prices down which makes it with easy reach of people on a tight budget.