I always hear about bad stuff in Sony warranty about everything but...either I'm lucky or the service is different here.
Case 1, my PS2 had problems when closing the lid and it kept "open" thus not reading games, that happened in day 1, and I bought the PS2 at about 10:00 a.m., called Sony Service over here, and they told me to bring the PS2 along with the receipt. They checked it, and told me to come back in about three hours. Since it was in downtown, I bought some stuff, then I came back.
At about 3 p.m. they told me that one of the springs in the lid were broken, so they replaced my whole package, (game + system) as new. Got back at around 4:30 and it's been working awesomely since then.
Case two, my old Sony Ericcson phone died and I went again to Sony Service, "come back in two hours" blah blah, did so, and they replaced my package but asked me if there was important data in my cellphone, I said no, and I walked away with my replacement phone, since the battery connection died and it was easier to give me another phone.
So I don't know, they have been quite cool with me, but I have heard cases of people complaining about their warranty, like someone said, she CAN'T be the top position there, also, I agree with Cosmic. You gotta clean your stuff often.