I always take the look out gnoblar. It has saved my characters more often than not. I do end up having to explain what it does once or twice a game though. When I roll the LOS, my opponent is really quick to say, "You do not have 5 in that rank!" Then I explain what the gnoblar does.
I usually have the 5 or 10 points to spare anyway as most of our units are so expensive and it is sometimes hard to come in right on the points levels that we play.