ES4: Knights of the Nine - Review @ Gameplay Monthly

Knights of the Nine has been reviewed at Gameplay Monthly.  The score is 'A-' and apparently this content includes some non-linear questing:

Don't worry though, the rest of the quests in Knights of the Nine are not tedious at all. The rest of the quest-line includes item gathering which may not seem so exciting at first glance, but upon doing these quests, this is not the case. These quests are by far the best in the game, for they are not the linear dungeon crawlers you have done over a hundred times now, they are truly complex and require some thought put into them. For example, one quest tests your patience in combat; another is a series of riddles that open new path. These are nothing like those boring Fighter's Guild quests.