But the idea that the employee gets the money immediately/overnight upon approval at the end of the trip, or maybe weekly (for long trips), instead of waiting weeks for a paper check, is huge. As is offloading a lot of the accounting 'grunt work' of it to another company. And snapping photos of receipts with location and time data and categories directly attached, and not having to worry about where they're stored (it's all in the app and on servers) is a huge convenience too.
Sounds like an exciting idea.