This product is amazing. I cannot brush my wet hair as it tangles so easily. This has made this process so much easier and quicker. With a normal wet brush it takes me 15 minutes with a lot of hair fall out. With this brush it literally takes 5 seconds and no fall out. The batteries do need to be changed more frequently than I hoped. Wish they made it chargeable or plug in. Overall great buy!First saw this on a tutorial and was interested. I could hardly wait until it arrived. So here it is. I LOVE it. My only complaint is that I wish knew about this years ago. If it has existed that long.I strongly recommend it for your little one’s hair. No more struggling with tangles especially after shampoo.I also strongly recommend it for long hair. It just glides through like butter. It’s also good for medium hair but super helpful in keeping your long hair healthy, no more ripping through the snarls.So, I say BUY IT! Not expensive, easily fit in your luggage. For me there is no down side.It works the way you except it to. It basically uses soft silicone brissles that vibrate out the tangles, I'm pleased with this, but make sure you use it in a slow and steady mannerIt works for the most point... I ordered the “name brand’ one to replace.... we will see...Can’t brush your hair quickly. Works better with wet hair. Kind of loud. But it does get the tangles out. Battery life is short. Worth the price though.Its extremely loud and thats why i cant give it more stars but it works on my extremely fine and knotted hairThis brush does not detangle very well at all. It has lasted me longer than some other reviews. It works better with wet hair but still doesn't detangle my daughters hair.Absolutely awful. Does not work at all. I waited 2 months for this to come in and after I put in batteries (that were not included) it barely moved. The plastic is cheap and almost comes apart in your hand. Customer service from the seller was horrible, whiney and tried to be manipulative. It was also delivered after the return window closed so Amazon was no help either. Don't waste your time or money