Great concept, but…
Sadly, the GPS reception in Edinburgh (with the tall buildings) means the app can’t tell exactly where you are… which would be fine *if* the app didn’t insist on you being bang on top of the location before it’ll let you play the relevant section of the audio-tour (i.e there’s no way to override the app to tell it to play the audio you want to hear…). Developers: please consider a more loose location-awareness of the app to help avoid this frustrating situation.