Actually, yesterday was my 1st birthday w/ the 272
NO problems whatsoever and I can say the same as my previous 241. NEC support is really very good, had an issue where I stupidly broke the stand of the 241 and they simply said 'no problem, we'll send you a complete new one'.
I dont recall offhand the # of hours but it's not a little and not a lot, maybe 1200-1500? I love the instant stability of the LED backlight.