I purchased this unit a couple of weeks ago to replace my smoothie blender. The Oster is powerful at a low price point. I am pleasantly surprised by how well it makes smoothies. Here's the problem; the 24oz Smoothie Cup has a thin gap about two inches below the opening. Residue from blended items are collecting in that space. It is impossible to clean out. I am worried about bacteria, so that makes the cup unusable. Since it only comes with one smoothie cup, that is a big problem. Had it not been for that issue, this is essentially a 5 Star product. [This review was collected as part of a promotion.]