Nice machine in general, with some annoying inconveniences.
Both user and root archs are excellent, especially the root part.
However, the root part should be doable in several ways, but I think the author blocked some of these ways to only allow the intended way, which wasted a lot of my time trying to figure out the working method to exploit this arch.
At the end, I wrote a python script that would root the box remotely, so that I can do my extended testing and properly understand what was going on.