My Coworkers iPad had a cracked screen, so the first time we made a go at it, we used a hair dryer to release the adhesive. Removing the cracked glass led to shards of glass everywhere. Not graceful. The glass destroyed the WiFi antenna, so it meant that we were going to have to open the iPad again.
The iOpener made getting the fragile glass removal go VERY smoothly. Combine that with a fresh project mat and some baller suction cups and the glass was never in danger.
I'd actually like to have 2 of the iOpener bits so that I can warm both of them to release the adhesive without running back and forth to the microwave several times.