Here are some helpful tips:
#1 Make a jig that will hold your heat gun above your workspace, you will need to adjust the height depending on how well your heat gun works.
#2 Put some clear packaging tape on the front of the glass to avoid glass chipping and flying, also to keep glass from entering under the glass and scratching the digitizer..
#3 The glass is easiest removed with a temperature between 155f and 165f.
#4 Work top to bottom. Ear piece to button.
#5 When prying the glass off MAKE SURE you are between the glass and the digitizer, it is easy to lift the whole LCD assembly.
#6 Work slowly, if the glass if badly broken it will not pull up as easily as a less shattered glass. I found that the digitizer was not as fragile as I was made to believe.
#7 Have plastic razor blades or a plastic putty knife/scraper handy for the removal and cleanup of the LOCA glue.
#8 Have 2 lint free cloths handy for the cleanup and removal of the LOCA glue.
#9 When the glass is almost off remember to pry off the back and home button sensors from the bottom of the glass.
#10 When it is time to clean up the digitizer use your putty knife/scraper to get most of it up.
#11 I found that Eucalyptus oil works well at removing the rest of the LOCA glue. Just put some on a Q-tip and swab the area you want to clean.
Here is a pic of what the digitizer looked like after cleaning with Eucalyptus oil.
EDIT: Sorry pic wouldn't link, had to make it an attachment.
I'm not gonna lie, while putting the new glass on I could not get all the air out, I did not get pics of the finished screen, but it only has a couple small bubbles. Well worth the $10 for the new glass.