I only skimmed.
I'm not joking about the Ordnance Survey bit. When I'm on walks, I often am in area with bugger all phone reception (common in the UK) and the quality of the maps means it really is as good.
It's why the lack of traffic upsets me so, because I'd love to use it in the car as my main maps for Android Auto, but without traffic, that's just doesn't work well enouhg.