started with wow-pro guides when LK was released, then switched to dugi and zygor later on when the wow-pro guides didn't really keep up with patches.
since putting some cash into the zygor guides, i'm definitely using them more, but quite often, i'll ignore the waypoints, and just follow my instinct on where the next quest is, as the guides aren't very linear at times, and ask you to change zones while halfway into them, leaving 10-12 quests still in the quest log when it prompts you to switch to a new area.