I very much enjoyed walking around despite no nearby map. The tile based map made sense to me, although I was kinda lost when it came to the colored circle map because there was no real sense of scale or direction when looking at it. A map scale (A small stick with Kilometers or Miles written on it) would 100% help. It was kinda hard understanding which direction I was facing in the game world so I had to use a map app to get around, it would be nice if it was easier to navigate with it without another app? Maybe a compass could help or maybe a player sprite (a ship?) facing the same cardinal direction as you on the tile map?
I think the minimized-data format is more than enough for what the game's trying to achieve, and I 100% think it's possible to use the minimum dataset for a fully fledged game. Although a nearby map would probably not hurt; I don't think it's necessary.
I would probably walk a maximum of 2 kilometers (About 1.2 miles) for a stop generally considering that my city isn't very walkable
Since I was walking through an old neighbourhood the source data wasn't outdated for me, I was honestly surprised when it gave me actual location names despite being an offline game. It mostly pointed towards nearby parks and a small free library.
One last nit pick is that the game doesn't run in the background so you can't turn off the screen or switch apps while you explore to the points of interest.
Yeah that was about all my experience with the game. Honestly this is fantastic. I'll be following it's progress closely as it goes on