I had one a few years ago, a good concept for a hiker or fisherman. I thought it a suitable replacement for the S&W Model 43. The sleeved barrel makes it astonishingly light, difficult to shoot well.
I could have handled the light weight, but I found the silver polymer finish to be pretty fragile (even solvents will damage it). I would prefer the 317 with a real anodized finish (351PD). Even better would be a Melonite finish stainless cylinder with the anodized alloy frame.