Have previously had a number of Garmin watches and last but not least a Polar M400. I switched from the Polar M400 because the pulse band broke and then I chose to upgrade instead of buying new pulse band. For me, this watch meets all my requirements for a clock for running. Finds signal quickly. Clear display. Easy to start and stop. Easy to configure different exercise profiles that you choose easily at start of training, eg running, cycling, kayaking, etc. and you can also easily create programs for interval training. Polar's page where the results end up are ok but there is a simple connection to Strava so the results are immediately uploaded there. With the M400, I had an error which meant that I had to send the watch to Polar for repair. The contact was incredibly good and I was just without the clock for a couple of days. Big plus!

Replace from a Polar M400 and is much more satisfied now. The clock is not pretty beautiful, but works everyday if you are not so picky. The optical heart rate measurement works really well for running, cycling and the like, where the pulse is relatively continuous, and maybe the arms do not move soo much. However, it does not work very well for gym training where the pulse goes up and down quickly, so I use a pulse belt (Polar H7), which works well. One slight disadvantage compared to the M400 is that the M430 has a special cable for charging.

Good exercise watch. It does what it's going to do with a goodbye. + Gets GPS fast + Apps Polar flow + battery - Notices, you can not see the entire median / scrolling. It is strange that Polar does not do anything about it.

Very good exercise watch + Good Functions (Step, Pulse, Water Resistant, Battery) + Quick, easy and clear interface that can also display notifications from the mobile + Beautiful watch with low weight + Material of high functional quality + User-friendly and detailed app Polar Flow, in addition to exercise data including sleep analysis, fitness test and exercise programs included - Could have been thinner, you see inner edge between glass and display SUMMARY: Best exercise watch so far, highly recommended. (My previous watches: Polar M400, Apple Watch 1 & 2, Garmin 735XT)

Good features, stable heart rate measurement and GPS. The disadvantage is that it does not fit as well as everyday life but the primary use is for exercise and it works well. The app does not sync properly and may require a reboot of the phone, but it seems to be due to the phone.