50 minutes - 2 hours
Bought an iPad, dropped it a couple times (on accident obviously) and ended up messing up the LCD display and it wouldn't turn on anymore. APPLE said they can fix it for $300
Went super smooth. It was easier then I thought and didn't run into any problems. ifixit says it difficult to replace the iPad 3 wifi LCD but it's not difficult. More like Inbetween easy and moderately difficult.
Buy the kit that includes the I opener. Made it super easy to loosen up the glue and get the whole kit that comes with the tools and picks so you can pry open the iPad front screen. And always be patient. Don't rush anything.
Also follow ifixit Guid! Perfect!