There is no sectioning, no clamping, no sliding down the same piece three times. You switch it on, and you brush your hair with it the way you already brush your hair. Your arm is up for a fraction of the time it used to be, because the job takes a fraction of the passes.

This is the part most people do not think about until they stop doing it. A straightener asks your hand to grip and release, over and over, the whole way round your head. This has no moving parts at all, so your hand just holds a brush.

And because it is shaped like a brush, it reaches the back of your head without you having to see what you are doing. That is usually the first bit women give up on and the first bit they get back.

Bobs, pixies and shorter cuts are the hardest thing to do with a flat tool, because there is not enough length to hold on to. A brush works with short hair rather than against it, smoothing and lifting in the same motion.

The tips of the bristles stay cool, so it can sit close to your scalp without catching you. There is also a small screen showing the actual temperature — 160, 180 or 200°C rather than the usual low, medium and high, so you are not guessing what your hair is getting.

It charges with an ordinary phone cable. No adapter, no special plug, and no cord attached to you while you are using it, so you are not standing wherever the socket happens to be. A full charge gives you up to 50 minutes of styling.

Switch it on, put your dressing gown on, come back. It is up to temperature in under two minutes and most women are finished a few minutes after that.

Professional tools run into the hundreds and most of them still need a plug, still need two hands, and still ask you to hold your arm up. This is £49.95, down from £99.95. That is less than two salon visits, and you are not booking anything or going anywhere.

Hairdresser Olivia May, who has more than twenty years behind the chair, puts it simply.

“In all my years behind the chair, I’ve seen few tools this easy for home use.”

“Most devices are made for the salon, not for home. This one actually is.”

That is the whole point of the shape. A salon tool assumes a second pair of hands and someone standing behind you. This one assumes you are on your own, in your own bathroom, with one arm and a mirror.

Use it at home for thirty days. If it does not suit you, ask for your money back and you get it. No hassle, no small print.

Delivery is free and it comes with a two year warranty.

More than 10,000 women are using it already, and it averages 4.7 stars across 317 reviews.