I was issued a Benchmade 9100 Tanto autoblade. It was well made and had the "wow" factor that comes with a swichblade but it wasn't something that I liked using. I preferred my SOG Trident for all of the cord cutting, MRE opening, nail cleaning, etc. Also since it wasn't a tanto blade it was much easier to sharpen.
I have an old WWII Fallschrimjager 'Gravity Knife" around here somewhere that I used to pull out as a joke around when all the guys would pull out their high speed Strider folders.