I had a few Boker knives, and still keep some in my collection. Not the Kalashnikov though, but I keep looking at it time to time...
My personal opinion: German made Boker knives are unreasonably expensive, their Magnum series offer great variety and cheap prices combined with crappy steel and overall questionable quality, while their Boker Plus knives are just about right - so Kalashnikov knives are worth trying, if you like bigger folders.