The fights themselves were all pretty good. I think a lot of lessons were learned from how the Eden raids interacted with all of the job changes and they took that forward into Pandemonium. People would complain about easy tank busters, Abyssos had them be DoTs. Healers had nothing to do, fine throw in Harrowing Hell, etc etc. Only big issue my group had was P8S P1. We cleared P5-P7 week 1 then spent 5 weeks on P8S....
Story wise I think it started strong then just got weaker and weaker. I was really hoping for a better story then what we got. The last sets story just felt so weak in comparison to the last set of story for Eden, Omega and Alexander. Here's hoping we get something like that next expansion.
All in all, good set. My group enjoyed our time with it!