I have a M94 I bought in the early 90's and it's been a good, reliable shooter.
Based on that experience I bought a M66 in 2002. Let's just say that was not such a good experience! Even though they have some models I really like I'm reluctant to take a chance on another one.
Haven't given up on them, but I'm still hesitant to buy another one. The reviews seem to be getting a little better than they were a few years ago, so maybe there's hope.