We spent five days there, which is just enough time to visit the island in a hurry - time flew by like nothing. You have to ask permission to access the volcano in the capital city, Santa Cruz, which will then be granted to you for a following day at a certain hour. Naturally, we managed to be there too late the next day, but arrived again the day after and the friendly guys guarding the entrance let us up anyways. Oh, and pleeease dress appropriately: you can't imagine the scores of stupid girls trying to walk a volcano in high heels and with almost nothing on - freezing to death at 3.700 m ASL and not able to walk in the rocky area... Well, at least this allowed us to be completely alone at the top of the crater! Another great feat of the park is, as it's at 2000+ m ASL, that even if it's cloudy down on the beach, it might be a gorgeous day in the park!
Enjoy the pictures below and get an impression of what it's like there. Otherwise, one last word of warning: do not take residence on the south side of the island except if you like artificial touristic sprawls: the whole area is one urban block of concrete and completely hideous. As far as I can tell, the north-east tip is best, maybe the (north-)western areas may have some nice hideaways from the touristic towns, too. As for the climate: just expect 20-25 ˚C in winter, 20-30 ˚C in summer - great! One final recommendation if you like driving on narrow, curvy mountain roads: rent a powerful car - I haven't had so much fun riding a car in a long time!