I got it last year when they released the Bad Water update. If you like city/colony builders go for it. It encourages vertical construction and terraforming. The goal is to make your beavers happy. You want to give beavers access to as many different foods and enrichment activities as possible.
The two factions have different tech trees. Folktails are more naturalistic. Iron Teeth use more industrial machines and enjoy processed food.
I have a similar Vornado evaporative one. The filters get crusty faster with straight tap water. I usually use filtered water from the fridge.