Love this watch and don't regret choosing this one. I actually returned a Samsung Galaxy watch after one day because the battery life was awful. This watch has a LOT of the same features but has an absolutely AMAZING battery life. I charged it completely prior to set up and wearing and it literally lasted a full 13 days before needing to charge. Measures heart rate, blood pressure, and oxygen level very accurately. I am a nurse and have used professional equipment to verify the accuracy. The ONLY con I found, and reason I didn't give 5 starts is that the app made changes to the functionality of my Samsung Galaxy phone making it difficult to answer calls. It changed my caller ID screen, how I answer or ignore calls, and the phone screen wouldn't show like normal while talking, then had to open notifications to hang up the phone. I tried turning off the call/text notification to the watch but that did not fix the problem. I uninstalled the app and phone went back to working like normal. I downloaded the app on my iPad to update settings as needed. Not a huge deal to me because I don't necessarily need the notifications on my watch, but if that is a feature you prioritize, just know it may interfere with your phone's function. All in all, I would consider this an excellent watch for the price.