I use the spreadsheet in conjunction with a relationship map and the fronts. The Map helps me track how they relate to one another and to the PCs (fear, love, suspicion, etc), and the fronts help remind me of their impulse. The spreadsheet just allows me to keep extra notes on all of them in a quickly accessible way without having to clutter up my other materials.
I've also found it to be useful for when the character's show up somewhere and I need some names pretty quick. "So you go to grab the totem from the blanket in front of the Mud Clan's shack, but Pabst and Spare get in your way." Now I can see pretty quickly what Pabst and Spare's gender's are and which parts they follow. This list is really helpful, I'm likely to grab a few of these categories and expand my sheet, so thanks!