Just installed this app and it works nice, wintered the public toilets of my home town - worked well, too. The only problem is that opening hours of toilets cannot be entered/changed from within the app. You need a browser for that - but the embedded Google map on their website is slow (with the iPads Safari, even with 3G) and the toilets cannot be selected... Thus only 3 stars
Franko30 about SitOrSquat: Bathroom Finder