Samsung Gear S2 is one of the best hardware you can get for yourself as a smartwatch. It a really great and amazing watch. Not only it has an heart rate sensor but many other things that will really impress you.
Samsung gear has a moving dial so you dont have to swipe everyone you can just spin the dial and the music player. Your notification, heart rate sensor, and music player etc just comes in an instant and its a really quick and easy way to get to your apps and is a really practical watch you can buy with the scratch proof protection which is very much needed if you wear it for your workout.
The watch is so much easy and comfortable to wear and the heart rate sensor tells you all about your health when you are running or walking. It is really durable watch. I never had any problems with this watch and had to go to the service centre to repair it and its been a almost a year which is really impressive thing.
The battery last for 20 days Im a single charge of you dont keep it on always on option and this is one of the pros of the device.
I would recommend it to anyone who is looking for smartwatch for the most practical use and durability.