I've beaten it and done all side quests.
Overall I thought it was enjoyable. The struggle between Desmond and Professor Calvert was definitely the highlight of the expansion, but the drugged hallucination you get from the seeds that shows the choices you've made as your character was extraordinary.
Either it was just me, or the swamp people are pretty tough. Most of them took 3 to 5 hits from my Tesla Cannon. And don't get me started on the Reavers and Albino Radscorpions, they're immune to fucking everything I had.