Wonderful guide! I had already torn down my iPhone once prior to this walkthrough so it wasn't as hard the second time around, lol. But with the battery replacement I received from this very same site, I was in and out within 20 minutes. Easy peasy :) Guide was very detailed and elaborate, I'm quite impressed with this walkthrough and the site in general. It's the perfect place to feed my desire to tinker with, and fix, electronics :3