Hi, Just wanted to let you know I have just succesfully replaced the keyboard unit on my late 2011 MBP (15" model). Water-spillage, so didn't even try warranty. That said: none of the liquid sensors had been triggered! The keyboard unit I bought off ebay was declared as "100% brand new", however it had VERY clear marks on the back, so defintiely second hand. Still a bargain at US$30. Prior to disassembly the biggest question was: Will the keyboard unit be RIVETED or SCREWED onto the aluminium enclosure? Luckily, it was screwed, about 60-70 tiny little screws (all the same size, Philips 000 screwdriver did the job nicely). Careful though: I have heard reports about other MBPs being riveted! Not sure which models/years... Overall, the repair was fairly straight-forward. The only REAL nightmare was to put the keyboard ribbon cable back into its slot. (Step 17 here: http://www.ifixit.com/Guide/Installing+MacBook+Pro+15-Inch+Unibody+Late+2011+Upper+Case/7532/3 The only cosmetic problem I've got now is the backlight display: in the centre it's nice and bright - on the outsides it's incredibly dim. Maybe I wasn't careful enough when I put the backlight foil back onto the acrylic backing. (There's tiny little holes in the acrylic for the backlight LEDs). Other than that: Very happy to have saved myself from purchasing AppleCare a while ago. And I now know two things: 1) Disassembly is not as hard as it seems. 2) Thanks to the backlight display backing, the motherboard is fairly well-protected from water spillages. As long as you turn the laptop upside down to dry out, things should be fine in most cases! Hope this helps!!