Would be nice if you also compared it somewhat with the previous version, namely the Zbook Studio G4.
The reason I am saying this, is that I've owned both, and while the main components used, i.e. CPU, GPU, etc, are definitely an upgrade from the predecessor, i.e. 8750h vs 7700HQ, and P1000 vs M1200, the overall build quality is significantly lower in my opinion.
The chassis of the predecessor was more akin to the sturdy shell of an macbook, while the new one feels more flimsy, and in fact the plastic top bends and can touch the monitor from the inside. The internal configuration of components was also better, however the addition of a second exhaust vent works well enough for heat dissipation. Another gripe I have with the new version is the change of touchpad, since the one on the G4 had a tiny button on the top left, which when double-tapped, turned it on/off, something very useful when using a mouse instead, while in the G5 I have to go through Windows to achieve a similar result, which is rather buggy.
Good review in other regards, however it is my opinion that it's not only against its competitors that a product should be compared against, but also against its previous versions.