Is Krav Maga really an effective Combat and/or Civilian unarmed combat fighting system?

Put it this way... If you want to learn a Martial Art for self defense purpose only then Krav Maga is possibly the best thing out there. It teaches you everything from how to remain calm in a life or death situation to effectively disarming somebody with a gun to your back or head. I trained in it for one month when my friend gave me a free one month membership for a school he signed up in. I literally learned more in a day then I learned in a week of Muay Thai classes. The instructor I had took his job very seriously and made sure that by the time class ended everybody knew how to effectively use the techniques he taught that day. Find a good school with a good instructor and I guarantee you will love it. If I could afford it, no doubt I would be going everyday of the week. It is so fun!