Absolutely wonderful. Plenty of detail. Water can stay completely within model, or chip the end about 3/8 and providing an external recycling water supply can lend a creek output from the spring on the hill. If you do this be sure that the internal pump will always reach below the water level when external water is turned off. That way it works with or without external water supply. Needs colour and foliage on the hillside. May seem pricey, but needs no added details for an action accessory on your layout. There are evaporation retardants available for water if you are concerned about moisture. NOTE: The Pump Requires AC Voltage.