I've tested a bunch of Shark vacuums and they all have the same problem

Let's get one thing clear before we start: Shark makes some great vacuums. But having tested a number of different models from this brand, I've noticed they all fail in one specific way. It was especially clear in a recent group test to find the best cordless vacuum, in which I compared options from a range of brands side-by-side.

Here it is: user-friendliness. And in particular, how the brand conveys information to the user. It might seem like a small thing, but it can be ultra-frustrating, and I suspect it means some people aren't getting the best from their appliance, simply because it's not clear how to use it properly.

Take, for example, the Shark PowerDetect Cordless. It's a stellar cleaner, smashing through all my suction trials in the group test and earning the highest overall score in this area. But making ...