The battery doesnt last much. I had to buy extra silicone holders. The other anchor/holder fell off. The data gathered is good, but the interface and the presentation of the data is so limited that it hardly helps you. Takes time to charge. Light indicators are very complex. You have to sync after every session, else 2 session's data comes up as 1 one session. Lot of positives too, the unit is very light, hardly changes the weight. Too costly for the value it delivers.