The accuracy varies a lot from my experience. Both my buddy and I do a lot of mountain biking together. Separately he runs and while I mostly walk. We have both found that they can be off by 10-20% compared to our Garmin bike trackers on the trails and comparing our distances side by side. We have also both found them to be off by 10% or so with walking/running. This has been an open discussion since the Series 2 days and we have both upgraded regularly hoping the better processors would fix the issues. He even got an Ultra last year and it hasn’t proven to be much better.

In my configuration with ATT Fiber, I have a Ubiquiti UDM-SE that goes to a Unifi Aggregation Pro. The the Agg Pro then has various runs, one which is a Unifi Flex XG in my office (has 4 10Gbe ports). You can technically skip the Agg Pro and just use the Flex XG in your office.