I'm tired of finding lumps and unprocessed chunks of food when I use this jar, REGARDLESS OF HOW LONG I KEEP IT RUNNING. It will start warming up the contents before it can process it all well enough. It's lousy, lousy, lousy. They market it as a good jar for nut butters, but their message also sells it as a great jar for smaller amounts (Like the calorie-packed smoothies I make for my 2.5 year-old). Well, it isn't. I'm disappointed to have spent so much on it. FYI, I have the 3.8 peak horsepower motor, and have tried the jar at highest speed.