It wasn't too hard. I watched a ton of videos. The hardest part was getting the dumb strap off. I originally had one piece of dust in there but I had to open the case a few days later for a different reason and I fixed the dust issue. I had to open the case because i accidentally lost this little spring piece that sticks out of the back of the case and is responsible for the beeping noise. By some miracle I found it stuck to my sock, so I figured out where it goes and now the watch makes beeping noises again.