I bought it and used it myself, and when I used it after working on the computer all day and my head felt heavy and stiff, it was cooler than I expected and I was satisfied. It gave me a different feeling from massaging my scalp with my hands; it massaged in a consistent manner, making me feel like I was being cared for even while I was just sitting still.
The ability to adjust the speed was quite convenient. At first, I started with a low intensity, and then increased it as I got used to it. It felt gentle and not too stimulating, so it was less burdensome. The silicone part was soft, so it felt comfortable without scratching the scalp, and it didn't cause too much hair tangling.
I'm not sure about the dramatic changes that the red light function can bring, but since I use it together with massage, it definitely makes my scalp feel more well-maintained, so I keep using it regularly. Especially when used together with shampoo, it feels nice to wash the scalp thoroughly.
It's rechargeable, so it's convenient to carry around and use, and it's not too noisy, so it was fine to use while watching TV in the evening. I think this is a product that can be safely recommended to those who want to simply take care of their scalp at home.
