You know the pattern. You buy one, it works for two weeks, it overheats. You buy the next, the battery dies before Christmas. The third one breaks in your bag on the way somewhere. This one has sat on the counter for over a year and it still does exactly what it did on day one. That is the whole point of the shape.

Cordless tools are only as good as the battery inside them. Most last about six weeks before you notice you’re charging it every two days, and about six months before you’re charging it every night. This one has a genuine 5200 mAh battery — around 50 minutes of styling per charge — and it charges over USB-C. Same cable as your phone. No proprietary plug to hunt down when it goes.

The screen shows the actual temperature — 160°C for fine, 180°C for everyday, 200°C for thick. Not “low, medium, high”. Not a mystery dial. So you set it to what you need and it stays there, instead of running a little hotter every use until the plate is warped and your ends are the price.

The tips of the bristles stay cool while the plate heats up. So it can sit close to your scalp without catching you, which matters more the shorter your hair is. Nothing to think about, nothing to be careful of.

Switch it on, put your dressing gown on, come back. In under two minutes it is up to temperature and it stays there. Not slower on cold mornings. Not slower after a year of use. The same two minutes every morning, which is the whole reason it is on the counter and not in the drawer.

Every corded tool eventually has that patch near the plug that gets stiff, then bent, then starts sparking. That is what kills half the straighteners in your drawer. This has no cord to fray, because there is no cord at all. You charge it, you use it, you put it back. Nothing to trip over, nothing to twist, nothing to replace.

Premium salon tools run into the hundreds and most of them will still end up in your drawer inside a year. This is £49.95, down from £99.95 — less than two salon visits. And if it turns out to be the fourth one that also lets you down, you get your money back inside 30 days. There is no version of this where you lose.

I’ve tried a lot of tools in twenty years behind the chair and I don’t recommend home tools lightly. Most are designed for someone with two hands, a swivel chair and a professional salon behind them. This one is designed for you, in your own bathroom, on your own. That is why it comes home with my clients and stays there.

If you have already been through three brushes, we know exactly what you are thinking: not another one. So try it for 30 days. If it goes the way of the others, ask for your money back and you get it. No small print, no restocking fee, no arguing about whether you used it right.

More than 10,000 women are using it right now, and it averages 4.7 stars across 317 reviews. What almost none of them will tell you in the review is that this was not their first attempt. It is their fourth, or their fifth, or their eighth. It just happens to be the one that stayed.