I bought this Vitamix for my mother who claimed that she needed a new one after her 8+ year blender started to "sound" different. She seemed to have been disappointed at first, because she didn't get the blender with the pictures, but I think it gets the job done. 

I have been using this blender to make nut butters for my family, and I add a few cups oil first before the nuts.  Everytime it starts I get nervous that it's not going to spin again, because the blender struggles until finally after 1 minutes and 30 minutes of it screaming it finally works perfectly.

 Other than that, I love this blender, and I never thought I would be one of those people who prefer to make their own nut butters (very worth it). To be nit picky, this blender model has an uncomfortably weird lag time for it's on switch, so it's annoying at times.