My Early 2008 MBP 17, at 300 nits, is the first laptop display for which I've been truly satisfied with the brightness. The brightness and WUXGA resolution were the primary factors in my selection of the laptop.
I keep it at 100% brightness all the time, even in a pitch dark room.
My judgment is purely subjective and most likely influenced by my poor color vision. I'm certainly no expert on colors or candlepower.