The advantage I've found, especially for someone living in a hub city, is that my dates are flexible gives you very long and strange routings. For MSP - MCI, I can go MSP-CLT-DTW-MCI for about $250. Or I can go MSP-MCI for about $550. When I do a regular search on my dates, multiple connections, strange routings, and cheapest prices do not show up. I've yet to book one of these, but it seems like an easy way to get work done without interruptions - better than the office! And a decent alternative to a self funded MR!