1 - 2 heures
Screen was broken and I decided to fix it instead of replacing the whole unit.
We followed the instructions step by step and it went very well. The phillips screwdriver ended up not really working on the first set of screws but i had another that was better but other than that everything went really smooth.
Follow the instructions carefully and just take your time and be careful and it should go as shown.
Phillips #00 Screwdriver
Tri-point Y0 Screwdriver
TR6 Torx Security Screwdriver
MacBook Pro 15" Unibody (Mid 2010) Display Assembly