I will agree with a few of Dallas's points...
But..
What size fleet do you have?
What types do you fly? Heavies, Widebodies, BizJet?
Schedule or Charter?
What is your area of operations?
Do you fly ETOPS?
The list goes on...
If you are a small operation with a couple if Bizjets, then maybe PPS could be the way forward for you. If you are flying something bigger or have a more complex operations set up, then I would look at one of the bigboys on the market.
As Dallas said, Jepps is the market leader. They may appear more expensive at first than say LIDO or NavTech, but the devil is always in the detail and some providers do have extra hidden costs, which in the long run it will work out more expensive. In a nutshell, What do you want? a Flight Planning system akin Mercedes that gives you reliabilty, technical expertese and support or one like a Reliant Robin that flips onto its side the first sign of a fast corner
