The idea of "OPEN" is a great concept, at least in my opinion, as a vehicle for alot of things, but; I do wonder how it can grow beyond its core user base. Sure, I've read some articles detailing what it believes it can do, but it does appear that only a certain segment of the marketplace, even those who own cell phones, would access and use this service. OPEN continues to be a great app to have available, but not necessary really to go about day-to-day, which is why its rise in price, seems a bit questionable and cautionary.
We are just at the beginning - more and more restaurants are signing up - no longer just 5 stars - more user reviews - menus - and a location based app - are all improving the user experience. A win - win for all.