The clock is excellent. . The battery life according to work I can confirm - even more so - to use with GPS in continuous operation for the specified time is exceeded but by the product to about 5 hours. I highly recommend this product and it can easily keep up with the much more expensive watches. The GPS of SpoQ works in the dense forest as well as in open view to the sky! Some product testing white on the allegedly heavy weight of the clock on the arm with about 83g, compared to its competitors with about 50g. - They should supposedly need strong arms. I can not agree with this argument. The clock is well on his arm and weight, not noticeable, even more than 20km - which was previously with the clock my longest run - the legs felt heavy. I had expected after reading these reviews, I had to carry half a weight on my arm, which turned out to be dead wrong. The product is so poor with normal recommended for marathon runners, men and women also. The software installs quickly and the clock can be connected via USB 2.0 to your computer. The software is great - it shows the exact running track and a variety of other statistics. I was absolutely positively surprised. It also allows the track again to play on PC, similar to a seismograph and additional tempo, heart rate display, etc. So it is here possible the distance covered to analyze and make any improvements for the future. To swim the clock is not suitable because you can stand just over half an hour up to one meter deep water. The manufacturer says that the clock keeps a triathlon by loose, but I want to try it rather not. For my purposes - Running - this clock is absolutely sufficient. It also allows the specification of other sports activities such as gym or interval training, or for example if you go running or go for a walk. The navigation system works wonderfully and it is also possible on the clock to carry out a navigation maps. Here, I liked the best, the one the clock with a few button presses adjusts that they have a way home leads back if you get lost. The only drawback: The clock can be charged only on the USB cable, so you must start your PC when loading, which takes a maximum of 2.5 hours. Charged half the clock is already after 30 minutes. There may also be an adapter - USB-to-wall socket, but I have so far not made me as competent. I am glad to have decided on this clock and completely satisfied! I hope my review will help you a purchasing decision to cases!