I had a 95 maxima with over 270,000+ miles on it that i drove for 4 years, then i gave it away and they drove to over 300K before something blew. currently my girl has a 96 with 140k on it, drives it LIKE CRAZY. nothing major has went out of it, the only problem she had was when she bought it, she bought it with some sensors fucked up. other than that, drives it like fucking crazy. my 350z has 110k on it had it for almost 3 years. there are countless stories of the VQ with over 300K on it, even more. it's fairly common occurrence with that platform.
i wasn't trying to say the Buick wasn't reliable, just that the maxima (nissan) is MANY YEARS proven reliability.