This has been a great purchase for my teenage daughter. She was wanting an expensive one, so I settled on this to see how she would do with it. It has been really good and durable. The only flaw that I have, is it doesn't seem to last long on a battery charge. Also, the battery is a USB port, so that was a challenge for her to get used to. All in all, she absolutely loves it. I will be purchasing another for my 7 year old. #RankBoosterReview #Chianruey #FitnessTracker