You can macro Solace to cast Solace on your target's target (usually the boss in a raid). This will prevent you from being able to cast it on an enemy target...but you can fix that in the macro too! I can't log in to copy it (servers down) right now, but it's useful for me as Disc for Atonement healing and soloing/dailies.
Not that this would necessarily change your opinion on the talent, just pointing out you can make it easier should you ever decide to use it.