I previously purchased this product and was really satisfied with it, but I lost it so I bought a new one. During previous use, I even rode long distances (400km) and accidentally ran the washing machine a few times, but it still worked perfectly fine and I didn't have any skin problems. I'm extremely satisfied. The connectivity is excellent, even supporting Bluetooth with ANT+, so it's easily recognized by speedometers and mobile phones. The data reliability is also excellent, and most importantly, it notifies me of heart rate issues through vibration, which is really great.