The whole job was done in a few minutes, the included tools opened the case easily (although easy is relative...iPods are tough to open in any case) and the battery slipped into place just like the original. I strongly suggest you watch a bunch of YouTube videos on how to do this, because each one gives you a part of the total story.The most important thing I found for my 5th gen iPod was that the connector for the battery ribbon cable must be gently "unlocked" NOT removed, by pulling up with a tiny screwdriver, just enough to release it. Snap it down after you replace the battery, click the case back together and enjoy your music. Just remember that the inside of your iPod is a fragile place, don't disturb any of the other cables, and don't force anything, you could crack the screen. Be deliberate and careful and you'll love the results!UPDATE:After using it for a while, I can only add some more good things. The battery has PLENTY of capacity. It lasts through many hours of normal use. It charges quickly and then lasts for days of what I consider "normal" use. I suspect that if I add it up over a few days, it lasts about 4-5 hours of actual playing time, which for my older iPod that spins a big hard drive, is fantastic.