I got this watch to help monitor and control my POTS, and honestly I really enjoy it. I love using all the features.HEARTRATE- I used both a oximeter and blood pressure monitor to compare heart rates. It was held very well accuracy. Workouts display your highest heart rate and average including a map of your different heart rates. It measures your resting heart rate, your heart rate variability, heart rate throughout the day, and etc.Health metrics- I found this part of the app interesting, breathing rate, heart rate variablity, skin temperature, and resting heart rate is here. I like seeing the different trends and taking note of how my health impacts them. I came down with a runny nose one day and it went away the next (assuming my body fought off whatever it was) and i noticed a major increase in overall body tempt, a drop in breathing rate, and a drop in heart rate variability.Stress management – each day a score is given based on these factors responsiveness, exertion balance, and sleep patterns, you then log how you feel that day. This can help you notice how stress impacts your body and performance.Mindfulness- I enjoy the breathing with the watch features, the watch has you inhale then vibrates as you exhale. The app comes with a bunch of videos for mindfulness.readiness score- This score is based on your heart rate variability, activity level, and sleep. It gives you a score based on what you should focus on, ex a 1 score after a high intense exercise day tells you to take the day and focus on recovery while a higher score let’s me know my body is ready for a nice exercise. I don’t always follow this score since I am a dancer and I have practices anyways haha.Exercise- one flawI believe if you are a healthy person you shouldn’t have any problems, but I don’t believe these calories. I heard that fitbit uses your heart rate, and when my heart rate due to POTS is very high; it says I burn a huge amount of calories everyday. Of course i don’t know the way POTS impacts calorie burning, but I do not believe it is accurate due to my condition, I am sure it is fine for others. That being said I enjoy every other feature it automatically logs workout if detected with the time, avg heart rate, calories, and zone minutes. It displays a chart of your heart rate with the highest and the amount of time you spent in each heart zone.Sleep profile- this has kept me in line would making sure I get sleep, I have found it to be pretty accurate and I love seeing how well I slept / when I need to get it together. Gives you a score based on time asleep, deep and REM, and restoration. Displays your sleep in the different cycles.Weight, period, food, and waterI don’t use these features much. The period assumes your fertile window is a specific amount of days after your period but that’s not entirely true, please research it if you are wanting some type of family planning birth control. Weight I log sometimes but it’s nice to have everything in its spot. The rest are nice features that you can use I just don’t feel a need for.STEPS- I found these to be really accurate.SKIN REACTIONI got contact dermitis which doesn’t hurt or anything I believe twice. What would happen was I had it pretty tight around my wrist and on top of that throughout the day from washing hands or dishes would get soap or water stuck between it. Do i think this is the material fault or the watch? no I also don’t think it should deter anyone from buying it. Just make sure to clean your watch, make sure water and soap doesn’t get on your wrist/ under the watch, and don’t wear it too tight. If it ever happens to you, just switch your wrist while it heals and take note what the problem was.Notifications/ alarms/ Tile/ etcI used the timer/alarm sections are backup. No sound is played it just vibrates. Tile is a nice app you can set up to find your watch. I don’t tend to use the notifications but you can see your notifications and texts that come on your phone from your watch. And i am probably forgetting a few things but I think I covered a large portion.OVERALL- In the beginning I had to get used to using the watch but once I adjusted it was really easy. I think for the price the watch is a great health watch and I would definitely recommend it!