About two years ago I ordered one for a 642, however, when it came, I realized that the wood grip panels were not flush along the entire front where the panels should be flush with the frame. Mine were back, say, about 1/16" from being flush. I tried the Tyler and it looked terrible, there were spaces where it should have met up nicely with the front of the wood grip edges.
Anyway, I was kind of bummed over the whole thing, I called them and they happily took them back and gave me credit on my credit card. There were absolutely NO issues other than, perhaps, waiting for several weeks for them to fill the order, which I completely understand.
I suppose I could have complained to S&W as that is who I ordered and received the wooden grip panels from, however, other than the Tyler not fitting, I am fine with my wooden panels. They look nice (even though they are not perfectly-flush with the front portion of frame)!
I was going to try to file down the Tyler to make it fit, then I thought of all the times I try to "fix" something, only to make it worse than it was, then unable to return it because I modified it!