5 - 30 minuten
The original hard drive on my 15" mid-2012 MacBook Pro decided that a new life as a brick was something that it wanted to explore. I said "Fine, but you don't get to take the whole MacBook with you!".
Easy peasy. The online repair guide was brilliant, and the whole job took a grand total of 30 minutes (for the actual hardware replacement)....the OS reinstall, well, that's a different story, since I couldn't find the original OSx discs. The good news? iFixit had the links I needed to get the info to create a Yosemite boot disc on a USB jump drive. It took a while to sort it all out, but I now have my non-bricked Macbook back, and it works even better!
Do, do, do get the kit that they send you with the hard drive. It has all the drivers you need, gets you the spudger, and makes life a whole heck of a lot easier! The only thing that I would have wish I'd have known was how flimsy the edge of the battery connecter can be. It's easy to remove, but I broke a little piece by not prying it off at the best spot. It worked fine working in the middle of the connector, not so much at the corner.