I've had 4 of them. 3 stock models (1 blue, 2 wndr) in .45 and 10mm and a 10mm hunter. My front sight fell off the hunter out in the field and I never did find it. Glad it came with a spare.
Wish I'd never sold the blue one. Still have the other 3.
Never had to deal with their customer service because... well... because they just work. I love the witness line.