Again, I would stress that this was 10 years ago, so it may very well be the case that Kingfisher bokkens have improved tremendously in terms of performance, but considering that I shelled out $200+ on them and had them splinter and break on me in matter of months, I think I'll be sticking with the white oak.
I enthusiastically agree with Marc Abrams's endorsement of Kingfisher Woodworks. This is the first time I have ever heard of such an experience with Kingfisher's products. I have a set of bokken and jo that I got in 1991 that are still going strong.
Did you contact Kingfisher when you had problems with your bokken? In my experience, the company has always gone above and beyond to ensure customer satisfaction.
Please feel free to send me a PM.