1 - 2 horas
Replaced the screen because it was cracked.
Everything went just as the instructions said it would with the exception of the time it took. I'm a novice-intermediate repairer and it took me somewhere between 4-5 hours. Of course, this included making a few errors and having to redo some steps but in the end, I was very pleased that I was able to do it and everything is working perfectly!
Keep another phone/tablet close by. Twice, I referenced a YouTube video to see in action, how a particular part of the repair should look. The first time, I struggled to get the SIM card out but once I saw the YouTube video, I realized I wasn't pushing in hard enough. The second time was when I could not get the battery out, I realized I wasn't pulling hard enough after seeing it done in a video.