Not that hard and you can avoid removing adhesives if you are careful.

Mein Problem

Original (refurbished) HD was slowing down snail-style

Meine Reparatur

Decently quick and painless.

Mein Rat

Didn't do every single step since there were adhesives I didn't want to remove. Just to be careful and you can get away without disconnecting the camera or speaker/subwoofer cables.