I used it a few times and then stored it. There are no noticeable scratches or stains, but please judge from the images. It only has three settings: low, medium, and high. It's a capacitive touch type. You can fill it with a generous 3 liters of water through the large water inlet. The structure allows you to add water directly from the top, so you can easily refill it without having to remove the tank. The last two photos are from the official website.