I keep one in my survival bag, just in case. It's cheap, reliable, accurate, simple and barring, an EMP, it's bulletproof.I have been waiting for the battery to go dead, to see how long they last but I guess I'll just have them changed for good measure since my 4 year old G-shock that I wear everyday is still on the original battery, I'm guessing that this one will run for quite a while as well.Definitely function over form though.