The first thing of note is the level indicators. Why? Because the way to check the level in an AeroGarden Harvest is to lift the fill cover and look inside, where a post says "Fill to Here." On a Sprout, the fill cover is at the front end and instead of a post there's a plastic strip. The iDOO has a "Sight Glass" to directly see the level, except that you usually can't see it unless you shine a flashlight into the tank. More levels are on order and when they arrive, every unit will be equipped.
