1 - 2 horas
There were lines in the display
It was fun, but removing the top glass was not as easy as it was shown in the guide, but latter we figured out the correct temperature that has to be set to melt the tape or gum... Ended up breaking a new tool(heavy duty suction cups) that we purchased from Ifixit but other wise it was fun :)
don't be worried about setting little high temperature while removing the top glass....
Phillips #00 Screwdriver
Heavy-Duty Suction Cups (Pair)
MacBook Pro 13" Unibody LCD Panel