Quote Originally Posted by 'Flekkie',index.php?page=Thread&postID=201471#post 201471
It turns me toward any mob that I can cast an aggressive spell at, including the other faction guards. I wouldn't be surprised if it worked on players, although it only turns you once at the start of the cast (not continuously throughout the cast like the channelled ones do). So more useful with instant spells when against ritalin monkeys (and rogues). Also: if you cannot cast the spell due to facing you need to press it twice, but the actual turning effect is instant.

However, it does not turn turn me if it is targeted at a friendly NPC, or another team member. So looks like it's only useful for aggressive spells and not healing (unfortunately).
Good thing you don't need to face your target to cast a healing spell.