After researching Nuria I came across the reviews here (and weirdly the exact same one on Tripadvisor and was almost put off enough to go to La Molina instead.

Thank goodness I used my intuition and ignored the negative review. As a total novice visiting midweek I had an amazing day here and learnt to ski on a practically empty piste. I was accompanied by an experienced skier who enjoyed their experience too. This really is a great place, true it's compact and most suited to a day or two but it is so quiet and beautiful I cannot understand how anyone can dismiss it.

It hadn't snowed for days when I visited but two of the three green slopes were excellent and the third was not bad if a little slushy. From what I am told the blue's were excellent.
If you are looking for a quiet place to try out skiing while visiting BCN or Girona then give it a go. The negative review nearly put me off, don't let it put you off.