The device works well. I really like the fact that I can see my horse's heart rate practically live. The sensor seems to record correctly throughout the training session. The output graphs are clear enough, but in general the display in the application sometimes seems a bit chaotic. In particular, the symmetry graphs are not particularly intuitive, whereas the cardio and speed graphs are very clear. Before activating training, you're asked each time which horse to train, so perhaps I'd leave the last one trained in memory without having to choose each time. I find the wireless charger rather impractical, unsuited to a stable where there are sometimes no flat tables to charge the device. What's more, charging takes a long time. I haven't yet tested the device's operation on the jump, but I hope to be satisfied with it too.