I bought this as I was intrigued by the health features. Being of a certain age, blood pressure, heart rate is something that I try and keep an eye on now and to be honest, this watch was cheap, and I had very low expectations. I have to say I've been pleasantly surprised. On the downside it's not as polished and fancy as some of the more expensive competitors. There are some of the displays where the screen is ever so slightly too small for the text to be displayed, so you lose a character off the edge; as if the software were designed for a square screen and not round (but it's not a problem), and I'm not a fan of the recharging port; It's magnetic and works well enough but it's a bit fiddly for me. The display is perfectly readable, though I struggle without my glasses; but my eyes are nowhere near as good as they were. You can change the watch face and I picked a high contract one with large white numbers on a black background and I can read the time perfectly well even without my glasses. I can also read the other displays; it's just not as sharp as I would like without my glasses on. The good points certainly outweigh any niggles I have. I've compared its readings with external measurements and it's pretty accurate. The heart rate, blood pressure and blood oxygen saturation are all pretty close to what I get when using other monitors. There are warnings in the manual about accuracy, but it seems good enough to give you ballpark figures. It interfaces with my iPhone perfectly and all the advertised features seem to work as described. Don't expect too much from the manual. It contains a QR code that links you to the Apple store to download an app that links your watch and phone; was really easy to do and worked first time, but after that the manual isn't really much help. I'm still figuring out what all the numbers on the main display mean but all in all, I rather like this watch. I'm sure there are things it doesn't do that it's more expensive cousins do, but for the price I think it's a real bargain and I won't lose too much sleep if it gets damaged or lost (which is something I have form for unfortunatly). If the manufacturer reads this, if you ever add an inductive charging facility like on some phones, please let me know and I'll upgrade.