Not having to manually hunt for the best rates is a huge time saver especially for last minute business flights
Usually apps try to take % of booking, create their own reward system, or source deals with an affiliate model. This is the first that is stand-out and really just trying to make travelling easier :)
Used it to book my flight from NYC to San Jose via sms, super simple and worry-free!
Usually I use the slack messenger for work and have an assistant here will be convenient.
I think its great to have a real person on the other end taking something off my plate