With PBS like it has been said before, you have to have protections in your contract and the union overseeing bids. While this system is no where near perfect, I have had line bidding and PBS...PBS ranks higher. I used to cross time zones for commuting from MCI-DCA and I would use the parameters for check in >915 out <730 and only got stuck on 1 end or another 5 times in a year (I was around the 60% in base). So it definitely can make life better once you get the hang of it, if you have an operation Flica or some sort of trip trading system that helps a good deal as well.