Will it fit?
Why girth decides fit, and what a useful size specification looks like.
Guides
Buyer guides
Practical guidance on fit, noise, control and running costs, written to help you compare any device.
Noise in a shared home
What decides how loud a device sounds, and what a useful noise figure has to state.
Control, accounts and offline use
What a device does with no app, no account and no internet, and why that matters.
What to ask a seller before you buy
The specific questions that make devices easier to compare.
What one actually costs to own
Sleeves, lubricant and replacement parts: the costs after the purchase.