I've been using vitamix products for around 20 years.  They do an amazing job so I won't be without one.  The low profile 64 oz container does a great job of blending small or large batches and fits under a standard counter.  Generally it is very good.  The only draw back I can find is that liquids tend to leak around the lid for the large jobs. I never had this issue with the taller 64 oz containers.