I had a USMC Ka-bar growing up. Abused it as only a boy and teenager could. It never failed. I think I got it as a birthday present in 1986 and managed to hang onto it until I around 1999 or 2000 when I bought my first house and somehow, somewhere lost it in the move.
I replaced it with a new one and have had the same results.
It takes abuse and *usually* holds a pretty good edge.
My wife got me a black rubber handled version a few years ago for Christmas and I have almost destroyed that one. Modded the handle and used it to "practice" my grinding skills on the edge. Needless to say, I'm not that competent in that area.
For the price, it's hard to beat a Ka-bar.