This just works. Location photography, lovely cast, splendid camraderie - the four girls are friends, but they befriend other girls, find boys, the boys become mates.
Dolores Hart has perhaps her best role - spirited, smart, liberated, attracted to George Hamilton. Hamilton brings some second tier star power. Jim Hutton v affable, Paula Prentiss hugely likable, as is Connie Francis who isn't asked to do too much - she gets Frank Gorshin who is engaging, though I'm sure Francis wanted someone better looking. The sexual assault done on Yvette Mimieux is very well handled. The film shows aspects of its time but has aged far better than other movies from this era.