First of all, the watch is good for the money it costs, but it definitely does not live up to what it claims. I bought it out of curiosity because I thought it was so cheap that it couldn't possibly do everything it says. I got it because my gtrunner broke and I needed to have at least a simple watch until I replaced it. Well, it looks decent, I can't deny that. But functionally, it's a disaster. The battery lasts a maximum of 2 days. The screen looks like a pixelated mess. I put it in water when I bathe, as it claims to be waterproof up to 10 meters, but the screen starts to show signs of moisture and slowly dries out, but until it does, the buttons start pressing themselves. Its measurements are literally a lie. You take it off your wrist and it shows a heart rate of 88 beats per minute. Haha. The GPS is also inaccurate compared to a regular 2 km run. Overall, if you want it just for show, it's fine, but for sleep tracking, running, etc., it's a waste of money. I bought it for 15€ and I see it elsewhere for 80€, on sale for 30€. It's really a rip-off. Honestly, get one from a commercial company for 50€.