We're talking about a serious thriller!
I generally have a lot of broken hairs, that's why I usually go for dry cleaning at the hair salon, so that's why I bought it.
I put the strand in at some point and it got stuck halfway as it started to shred the hair (while it was only halfway through, I repeat), resulting in me ending up with a haircut at the end.
Stay away

it really does nothing! I spent an hour with the clock passing small little tufts and in the end the hairy ones that gathered were MINIMAL! If for an hour I had cut the little hairs sticking out by myself with good scissors, I would have cut many more.
don't buy it.

It indiscriminately trims the ends of the hair, just as they are cut during a haircut. It helps keep the ends of the hair cleaner for a longer period, reducing the need for a visit to the hairdresser. It will definitely still need a professional haircut, just less frequently throughout the year.

The worst product I have ever bought, defective, and in the attempt to contact them, there is simply a fake phone number that no one answers

Like all trimmers, it cuts indiscriminately all the small hairs that protrude from each tuft. It's not AI to distinguish which ones are split ends and which ones are not. Overall, it does the job, as long as the tufts are thin. Ideally, it should be used before the appointment at the hair salon, because after use, the ends look a bit crushed and need to be brought back to their normal state. It's good, go for it.

Very good and fair for its price. It needs 3-4 passes on each tuft depending, of course, on the scissors available, but in the end it does a great job!

I consider it excellent for its price. It indeed removes the frizz, although one might need to persist. For me, it is very good!