In reply to Stuart Williams:
Used it last weekend in fact doing a 47 mile training walk, what I like about it is if it shows a route it will show where you are meant to be vs where you are so anyone checking in will be able to see that too (so if you end up getting turned around in fog or something and get a bit lost and fall over they'll locate you easier). One person even messaged me to say I was off track (I was aware, the path I was meant to go down was plotted wrong as an oversight by me and was cutting through someone's garden) but it was good to know that someone had picked up on it all the same.
As for battery life, well I had mine going for 12 hours on my Fenix 6x, stuck my phone on battery saving mode (Pixel 4XL) and between that, a little bit of spotify on boring road walking segments and taking the odd photo here and there by the time I got back to the car I still had 40% battery left, I don't think it's that much of a drain to be fair.
EDIT: I'm also pretty sure the mapping can be swapped from google maps as default to open street maps by anyone viewing (might be wrong but garmin offer OSM as an option when plotting on Garmin Connect so it would surprise me if they didn't offer it for LiveTrack)
Post edited at 15:30