The main benefit of the PD platform (other than price) is the executions. THey are absolutely the best I have ever had/felt. Similar to Watcher/TradeScape etc., this is primarily due to a combination of software architecture and order entry capabilities. I know every platform has hot keys, but the order entry on PD-whether using keys or mouse-is the fastest I have every experienced and I have tried almost every one else out there. FOr my style of trading this is key.
It is not an analytics package like Realtick though (in fact I kept my Realtick for that portion) so you will need to get charts etc. from somewhere else. From what I am told, there next generation platform is out this week and has some major enhancements so I will be trading on it real soon. Hope that helps.