I have a few of his knives (neck - which I wear frequently, white crane, and kitchen) and am very happy with them. In my opinion, Murray is quite a talented and skilled maker. As you probably have read, he uses predominantly white and blue carbon steels for the blade edge. Heat treated properly, they hold an edge well and are easy to sharpen - and this has been my experience. I don't recall ever having read about anyone Rockwell testing one of Murray's blades but somewhere, I believe on his website, he states that with his heat treat, the blades reach a Rockwell C of 62/63? Don't quote me on that, but I'm pretty sure it is above 61.
This might make me sound a bit "persuaded" about his knives but I was also lucky enough to attend one of his week long blade smithing classes. Well worth the time and effort for me. Murray is a great, and patient teacher. I had a great time and learned a lot. Got to run now, but let me know if I can try to answer any other questions. You can also contact his shop with any questions. Mike