hi
mine is working, but you're right, we don't have to expect more than it can do...
Comparison with another humidity sensor : nope
Comparison with another temp senor : yep
in fact, it's still interesting and gives an indication. When you open your camera for some reason, you can see if you close it well or not.
you can also be warned if your humidity sudenly raises.
I think if you consider there are only 4 values ("Good" "Bad" "Better" "Worse"), it does the job.
Gilles.