This blender works great for smoothies. We typically use frozen fruit, milk or almond milk, yogurt, then our add-ins include chia seeds, wheat germ, and peanut butter protein powder. It only takes around 30 seconds for it to blend evenly. We initially hesitated buying this blender because we read comments about it leaking. The only time it has leaked on us was when we first bought it, and didn't know how to portion out everything - I would blend it, take off the blade to add more milk, blend it again, and then yes the sides kinda leaked. But once you figure out how much of everything you need and get used to it, it doesn't leak (only if you keep taking the blade on/off). The blender is noisy, so if you have roommates or live in an apartment, it can be annoying. To fix this, we put a hot pad underneath the blender to absorb the noise and that seems to be working - no annoyed neighbors at 6am :) Overall, we love it and feel like our nutrition has improved since we are consuming more fruit.
I use mine daily, introducing whole foods/plant based foods along with ground ingredients to my diet I might not otherwise eat. I feel more energized and productive throughout the day!