5300

Their 5300 always stalled on frozen smoothies and needed the tamper until they realised their freezer was colder than a friend's; partially thawing the berries fixed it.

Picked up a 2016 Vitamix 5300 on Marketplace for $20 and it runs perfectly.

Bought the 5300 and says it is worth every penny: it pulverises seeds to fine powder and cleans itself with a little dish soap; they ditched their Ninja.

Their 10-year-old Costco 5300 started smoking and shedding fine black powder at the base; a loose drive socket set screw had ground away the plastic housing, and their DIY repair failed.