Some caveats about PBS.
1. The companies that develop PB systems do not sell the software to pilots, they sell it to management.
2. The "off the shelf" PBS is very advantageous to management, that is why they buy it.
3. PBS can and does work well for pilots. However, that requires in depth knowledge of the particular system and contractual agreements that control its parameters. Every pilot doesn't have to be an expert, but your scheduling commitee does. The system must be tailored for your company and your contract. There are several "brands" available and they are NOT all the same. Some are far superior to others. Choose carefully.
4. Without pilot knowledge and without contractual control of the system, seniority can easily be trashed by a PBS program. It will be easy for the company to exlain this with "you didn't bid right" if your pilot scheduling committee has no knowledge or contractual rights.
5. PBS programs do not normally include a pairing generator, which is a separate computer program that builds trips. The PB system can't solve the problems created by "bad" or unproductive trips. A PBS can only build a line of time with the trips it is given. Put garbage in and you will get garbage out. Therefore, the pilot group must also have contractual agreement covering the pairing generator as well as the PBS itself. One without the other can easily become a bad deal.
6. Given 1 - 5, a good PBS can become the best thing since apple pie for pilots.
a. There is much more flexibility in what you can bid, i.e., many more choices and options.
b. You never get stuck with the same partner for an entire month. This is not only good for the psyche it also promotes standardization.
c. Being able to build your own line is a lot better than having to bid a line built by someone else.
7. IMO, if you have the right contractual controls, take the time to understand your system, learn and follow the rules and have basic computer familiarity, PBS is hands down better that bidding "hard lines".
8. Finally remember the Company also has needs. They have to cover all the required flying and they need to be able to do that with the smallest number of pilots reasonably practical. Like everything else, some compromise is necessary. You can't have it all your way.
Yes, I've used both.