I haven't installed these particular gauge faces but I can tell you what to expect. First getting to the cluster is fairly simple. You remove your headlight knob, which can be a pain sometimes depending on the state of the little tab that locks it on. A few torx screws hold on the panel that surrounds the cluster, followed by a few more torx screws holding the cluster itself. Once all removed you pull out the cluster, disconnect the electrical connections behind the cluster and take it out.
You then have to remove the torx screws holding the clear face on. Here's where it gets tricky. There are some faces that are slim enough to be placed over the existing gauge face however I don't believe this will be one of them. You'll probably have to remove the existing face which will involve removing the needles, and prying the existing face off. It will be glued on so you'll need a slim knife. Glue your new face on (It may lay perfectly flat in there without glueing however if its even a little bowed out around the center of each needle where the black center of each needle is you will have problems with the needles sticking.) Make sure its flat and put your needles back on. ( I would suggest researching proper needle removal/re-installation to prevent inaccuracy).
Also with this kit you'll have to splice into the driving light power wire for the blue lighting, I believe its the large grey wire in the 12v inverter.