Does what it is supposed to; excellent design; would have preferred metal as opposed to plastic columns, especially the top caps (metal with a screwdriver slot for tightening might be better - slot too risky for plastic). I really like open concept for cooling and ease of cable routing.
I added four quality casters to be able to shift it around. the 4 stars are for design but only 3 stars for materials and finish

Pros: open design, yet usable in limited space
Cons: Plastic columns, espeically top caps; quality casters (round spheres with a diagonal runner) would allow you to shift it around when installing or adding equipment, without stressing the loaded structure.