I recently bought the Blendtec Stealth. I have used Vitamix, Blendtec, and Breville in the past. This is very similar in performance to my Blendtec 625 that I had, but it is SO MUCH more quiet and a bit more powerful. The only down side is that there seems to be some factory grease on it from out of the box that doesn't seem to be water soluble. It's frustrating because it is such a beautiful looking machine, but then I have this dark grease on it, which gets on my hands and is kind of sticky. Maybe I just got unlucky with that. I digress, this is truly an impressive machine!