While I was making this smoothie, I noticed there wasn't a proper balance of liquid and solid foods, which made blending difficult, I ended up adding close to 1 cup of milk as opposed to 1/4 cup in order to get it to blend like I wanted, let alone achieve a good consistency. But, other than that, it's a good versatile recipe. Give it your own tweaks! Use what you've got around you, it won't hurt; I substituted almond milk for skim milk, added a teaspoon extra of peanut butter, and I could've added some greek yogurt or oats if I wanted, Different berries (blueberries, raspberries, etc.) wouldn't have hurt either. I recommend using a greener banana, so that the banana taste doesn't overpower everything too much. The riper the banana, the more prominent it is in your smoothie. Overall, 8/10 with changes.