It certainly makes sense to have all that in one unit. Unfortunately, they are a bit on the cheap side. You could pull together individual components of higher quality and save some space, too. The mirror, as you said, is useless since it is recessed. You wouldn't be able to signal with it. The whistle isn't as loud or reliable as a real rescue whistle. The compass is fine, but a button compass would also be a good choice. The match case is fine, but a bit bulky in my opinion.<br><br>I see these more as an item you would give to a child or a young scout as a first "survival kit." <br><br>