I replaced the battery in both my iPhone and my wife's in the same session. Using the slideshow and directions I was able to successfully do the replacement. Of course my iPhone was the first one done so as to gain some experience before tackling my wife's iPhone. I had two minor issues in reassembling mine. Firstly, I completely missed re-installing the number 3 cable. It wasn't till I was reassembling my wife's iPhone that I realized I'd missed it. Not sure what it supports as I had my phone up and running, checked the GPS, etc while it wasn't connected. Secondly, my camera wasn't seated properly and I got the strangest imagery when I launched it. All green and black, looking like one of those ghost buster reality shows using night vision. Fortunately, both issues were easy to correct. Outstanding directions and slides! Oh yeah finally, the kits for the battery comes with both a #00 Phillips screwdriver and a spudge, however, I ordered the extra spudge and got one that is better suited for prying the battery up.