I completed the entire Sig quest line and got me a very nice cloak and title. I had very little problems with the entire quest, with the exception of one NPC that did not have the "quest feather" in one camp, and quest appeared dead, till I started hailing all the quest people, and finally got the continuation one. Other than that, it went off without a hitch.
I know people want to get right in the dungeon get that loot for themselves and start selling it to others in auction, but I really did enjoy the questline, as it progressed me from area to area, zone to zone, dungeon to dungeon with a purpose, not like mindless repetition of dungeons over and over. If you don't do the sig questline, you will find this expansion..... quite boring.