It's not difficult but does require some expertise with a soldering iron.
There is a metal frame which retain the display. It has lugs which pass thorugh the PCB and which are then twisted to retain the frame. Tnen the lugs are soldered to the PCB.
The LCD just sits in place on the conductive rubber strips.
To remove the frame, one has to desolder the lugs carefully without damaging the printed circuit board. Then twist them straight so that they will come out of the slots in the board. Too much heat will delaminate the copper tracks.
When the display is removed note which is the top as there are no markings on the display and it would be very easy to misorientate the replacement. Mark a new display in some way, e.g., a dab of white out, so that you know which is the top. The surfaces are slightly different on the edge of the top and bottom and that's about all you have to indicate which is the top and bottom.
You do not want have to remove it a second time. Owing to the very high risk of damage to the PCB, I have not detailed the procedure in that article on the main site.