The blender itself is great and I use it every day. All the cups provided with it are really useful and help me make my smoothies and other recipes. I only have one concern with the power bowl, the cleaning process. I have been using the blender since October and in the "crack" between the cup itself and the [art that you rotate I have some dirt that is impossible to remove. I do not have a dishwasher and have been properly cleaning since the first use. If you have any suggestions, I would really appreciate it.