I have Dawson front night sights on several of my pistols, including a P07 and a P10c. They are top notch and I highly recommend them.
I put a Night Fision front sight on my SIG P365. The cup surrounding the tritium vile broke apart after 200 rounds. Night Fision did replace the sight quickly, so I was satisfied with their customer service. However, the second sight lost the tritium gas after only 100 rounds. I am contacting Night Fision tomorrow morning for another replacement. I'll give the third one a try, but if I have any issues, I'll go back to the SIG Xray3 sight. At this point, I think the jury is still out on Night Fision.