I have four, and so far, so good. They do require you to register for the warranty using a scan of the receipt. For what I paid Doug for these, if someday they all crumble into dust, it wouldn't be a big deal.
None of mine are the rimfire models, but one has the .223/.308 reticle. Etched reticles reduce the light transmission a tiny bit, but the images are all super sharp and clean, even the complex ones.
