You might want to check out Knitter's Review
They have a review of the Pony brand of Rosewood needles. It might give you some baseline upon which to judge the material, if nothing else.
But you know, if you like wood needles, there's nothing wrong with investing in a pair of something new to see how you like it. Even if you don't love them, you might find you end up with a project for which they are perfect. I have my favorite needles but sometimes, I have to go through the collection of my less popular needles to find the right ones for the job.