Very easy if you have a basic understanding of how a computer is put together. Took me about five minutes, honestly. The hardest part was getting a screwdriver that was small enough. The key is to go slow and BE CAREFUL. If you're going to disconnect the battery connector, DON'T PRY IT WITH ANYTHING METAL. That should be common sense, but it probably isn't. Also, take note that the ribbon cable that is attached to the SATA connector is very delicate. Again, be careful and you should be good.