Hi, we are sorry to hear of your experience. We would have loved to troubleshoot the machine and assist you with it. You can expect the same quality blend as you did with you old one, however you may have had to adjust how you blend a little. As technology changes some of our components do too. It is important to remember that all full-size Vitamix blenders are equipped with either a 2 or 2.2 horsepower motor, which moves the blades in the container at a high speed to pulverize the ingredients completely. On occasion during blending, especially with thicker mixtures like hummus, frozen desserts and nut butters, you may experience some excess movement/vibration from the motor base on your countertop. This is a result of the machine trying to move the blades through such a dense recipe at the same high speeds.

When this happens, the best thing to do is to first make sure you have your blender on the highest speed setting featured on that unit. Next, place your hand firmly on the lid of your container to steady it while you use your tamper to work the ingredients through the blades. This will help to create an easier flow of the ingredients in the container, which will also help to lessen the vibration. Please keep in mind that certain ingredients and recipes are thick or denser in nature, and some movement while blending is normal.