PolarVantage V Sports Watch for Running, Cycling, Swimming, Etc. Precision Prime Sensor Fusion Technology Enabled, Waterproof, GPS Watch

*** Delighted With The Vantage V - Paired With the H10 Heart Rate Sensor - Fab Battery Life For Ultramarathons ***August 2019 - Below is my earlier review. Now after updating the watch's software and using it for a while I can say that I *love* it. I've changed my rating from 2 stars to 5 stars. I bought a competing and well known watch and that let me down with its heart rate readings. The Polar Vantage V does heart rate and calories so well, and I've found that the GPS has improved. Battery life is also excellent. A worthy replacement to my old RCX5. I'm delighted with it. 5/5Previous review:The display is far too dark to read and there is no option to keep the light on. Pressing the light button turns on the light for about 5 seconds then it dims. The auto backlight is also not bright enough. I'd read reviews about the dimness but didn't expect it to be so bad because of all the photos one sees of the screen. The white text on black doesn't help. I bought this a week ago and I shall be returning it.Fortunately, I have my six year old Polar watch until the end of this year when polarpersonaltrainer.com is decommissioned. I wanted to stay in the Polar universe because I have six years of training data I want to be able to access and compare to future data. Also, I liked the 40 hour battery life on the Vantage V. Unfortunately, I might be switching to the Garmin universe. It's a shame because it's a beautiful watch to look at. However, for its cost it must deliver and it doesn't.

So there are three problems rendering this otherwise pretty HR tracker useless:(1) it significantly and consistently underestimates a true heart rate. Attached the snapshot of a training session performed simultaneously with polar V reading of wrist and Polar chest strap sending to Wahoo cycling head unit.As you can see the reading of wrist is underestimated by 35% to 52% against chest strap reading. It is so bad it can be plain dangerous when the athlete unknowingly trains above his threshold zone. Underestimated HR reading also renders he whole 'holistic' concept of Polar recovery a complete fallacy.(2) You sometimes get 'ghost' spikes in HR reading showing zone 5+ reading instead of true zone 2(3) The connectivity to iPhone and Android requires multiple restarts of an app. The bug hasn't been fixed for decades (I kid you not, I am on my 4th Polar tracker, albeit the last one)

Tried a Garmin Forerunner 735XT before this but hated it. This is well made, easy to use and intuitive with excellent support from the Polar Flow app - really love it and would definitely recommend to anyone looking for a high quality excellent GPS HRM.

Good interface. God's size and as far as I can tell tracks sleep, fitness and activities accurately. Good amount of sport/exercise profile sto choose from and gives an informative breakdown of you activities.

What a wonderful peace of kit .. it’s a shame it didn’t come with instructions and receipt

Had this for a few months now and really happy with it. App works well to.

good

Fantastic