Not going to waste more time trying to get warranty replacement of a poorly-designed unit, and instead look for a unit with on-off button or switch, rather than failure-prone screw-on spring-loaded "actuation".

Great finish, and sleek design

This to me is unacceptable and reflects a very poor blade design (and hopefully not intentionally in order to generate more blade sales).All in all

In short, it is a bad design and don’t buy it!

Not hard but not that easy to but pack in place - extremely poor design and irritating if you are making multiple smoothies

This is a critical design flaw

This is a BAD design flaw, maybe the designers should try and use this product and see what several others are complaining about...

It's a nice design too, there is no button, just twist and the blending starts

Bad design, bad product

The screw-base is just a bad design and all the peripherals that are meant to be screwed on to the bottles just clutters my kitchen cabinets.

The design is super poor

Major design flaw:

I dislike the twist design and will opt for a traditional blender instead next time, and recommend you do the same!

First off, I love the overall design and operation of my Nutribullet...when it works

Perfect for smoothies, purée , rough or fine chopped