There are a ton of other competing technologies. We have been to the Microsoft Indoor Localization Competition and saw the estimote there too: http://research.

There are a ton of other competing technologies. We have been to the Microsoft Indoor Localization Competition and saw the estimote there too: http://research.microsoft.com/en-us/events/indoorloccompetition2015/ http://research.microsoft.com/en-us/events/indoorloccompetit... The 4 meter precision is in the middle of the pack.