Seen a couple of SL done like this at GTGs down at PCS.
Look fine at first glance but then something catches one's eye and on closer inspection one can definitely see the edge lines of the wrap. Polish and dirt tends to lodge there, visible even on silver. The film can also give a slight yellow tinge to the paintwork. This probably develops with age and exposure to UV.
I have similar film on the leading edges of the rear quarters and rear door trailing edge on my CLS (standard fitting from factory), it's a bugger to keep the edges polish free and over time it's defo gone milky because of stone impacts( so, it's doing it's job!) and will need replacing at some point.