i replaced it on 2 hd7 phones.
its a real pain to get it off because the glue tape they use goes all the way around, and its strong stuff.
you need to take apart the entire phone to get to the ribbon cable where the digitizer plugs in, so just look for some youtube videos of a tear down and watch carefully.
honestly the hardest part for me was getting the screen and digitizer clean of fingerprints and tiny broken glass pieces without messing up the screen, while keeping the double sided tape i put on in place and intact.
just take your time and everything will go smoothly.
-edit- yes you will need some double sided tape because when you take the digitizer off the sticky layer of the tape goes with it, the rest of the tape stays on the screen and is impossible to get off without damaging your screen so you have to apply new tape over it.
i used some thin scotch brand double sided tape and i cut it into long narrow strips with a razor using my old digitizer as a cutting board, the same width as the original tape.