I didn't before using gems for habitats. But like you said, I'm also saving gems and looking for premium habitats. I'm glad when we get one during a World Event like they did before. (Artic Abode, Tinkerers Toyshop, Mystic Mire) Unfortunately not this event. I also love the premium habitats, don't no why I never bought it before. Well never old to learn😉. Love it that these habitats hold more coins and animals.