I used this guide twice; first to upgrade the internal drive to a Seagate 14TB, and then to replace the internal fan which had seized. Few things feel as good as when you put the unit back together, plug it in to test it and the green light comes on. (Huge sigh of relief)!

This guide is very well written and helped this upgrade go smoothly. I swapped out the stock Seagate 2TB drive for a Seagate 14TB drive, and apart from some X-Acto knife trimming on the rubber top piece before I put it back on, everything reinstalled smoothly and the Airport Utility formatted the drive without incident. Thank you!

Just replaced the battery in my four-year-old iPhone 5s. Only two minor hiccups for me; first, after reading the warnings about the old adhesives, I used my heat gun on the case in hopes of loosening the strips. That helped with the first strip I pulled, the one closest to the outside edge of the phone, but the second one ripped. The answer for that one was heat gun on the underside while lifting the battery, and then heat gun under the battery until the tape let go. Second, that home button bracket is a PITA to get back on! I tried at least 10 times, and the 10th time it fell off it also fell off my workbench. After searching around on the floor I reassembled the phone without it. But the good news after all that angst and frustration, the phone works beautifully. It powered right up, and apps I have that used to drain my old battery within minutes are no match for the iFixIt battery. So far, so good. And by the way, the iSclack is a very good investment; I got it for this replacement and am glad I did.