After testing the Polar Grit X, I consciously started looking for a lighter watch that still had all the functionalities.
As a woman with thin wrists, the Polar Grit is really too heavy (in terms of feel and look). The Pacer Pro has all the functionalities that you effectively use as a runner and an extremely accurate heart rate measurement (like all Polars). The only drawback is that Polar does a little less well in terms of GPS; in wooded area, it looks like you had been drinking while walking (zig zag lines). Algorithms in the Polar app and Strava app differ with regard to correction, so difficult to determine what is correct. However, for me running in the right heart rate zones was more important than whether it was 10km or 10.1km.
The interchangeable straps make it easier on the one hand to assemble smaller straps for narrow wrists, and on the other hand to purchase more 'everyday wearable' straps to wear, for example, at work/party/.... A slightly finer finish (eg chrome band around the case) would have disguised the sporty functionality a bit better in everyday life and made it less 'clunky', although already very elegantly built.