Have the T6c now for 3 weeks. The Designing is OK, but not great. Must at a heart rate monitor but not really. The abundance of the measured values are pretty impressive. The accuracy is acceptable. Unfortunately, the pulse tears sometimes from the beginning of jogging. This should at a clock that is located in the upper price segment, not happen. The light function is deficient. Unfortunately you have to decide whether to the real pulse rate or the proc. Share would view it. Both is not at the same time. Otherwise, the clock is actually attributable to the class.