Playing FSR before this was an interesting choice, I'd even say it enhanced my experience as the Lospass investigation in 2001 cast a dark insight over my understanding of the events of 1999. I found myself recognizing names, faces, events, places, not enough to give me any crucial information on the Kamui case, but instead adding an incredible weight to the characters and events that take place here.
I came into the story knowing some of these characters, or at least thinking I did, and my expectations were fully blown out of the water. Things were left unaddressed that I completely expected to be explained, and other things were explained that added so much depth to things I thought I understood. Now I have one more puzzle piece, time to collect the rest!