Every time Apple's repair policies come up on HN, someone mentions Louis Rossmann, and every time they do, someone replies (and it seems like a different person each time) pointing out that he has a significant bias against Apple, and to take what he says about them with a grain of salt.
All I personally know about it is what I've seen on here, but it does seem like it's worth being a little skeptical about what Rossmann has to say about Apple.