Instructions are great.
I overdid it with the heat gun and melted the casing:-(
also got a silver patch on the edge of the digitizer. :-(
Got to say it took no time at all to melt the glue with a hairdryer, nowhere near an hour:-)
Think you should stress cleaning the digitizer of old glue - other guides suggest that the glue will all remelt, this is not true:-(
Still I have a working phone, you can hardly see the distortion on the frame or th eglue left-overs, if you could see the mess I made trying to do same with an iPod (the devils work I tell you...) then you'd know why I am so happy