this is my fourth Blendtec jar for a unit I've owned for about 8 or 9 years, my second WildSide+. We're a family of 5 and the extra capacity makes a huge difference, but with this jar, I'm hoping the spinning mechanism lasts longer than the others. Looks like it will, they've improved the design of the washer or whatever it is that's always disintegrated within a couple of years on the last three jars