The Ninja Power Nutri Duo is the best and easiest blender around! Making smoothies and healthy snacks just got easier! There is a line that tells you where to fill liquid too and the order everything goes in. The blends very quickly and thoroughly, leaving nothing chunky and has 4 blending options. The variety of items I can make are even better, I have made queso, peanut butter, smoothies, almost everything you can imagine is possible! Clean up is extremely easy with just a little soap and water. This is a MUST HAVE for any smoothie lover.