170-4-150B : Fiddly but great quality

The pros:

Once setup, it looks fantastic and is sturdy as hell - especially considering how light an empty rack is. Flexible system that allows for many different configurations. Many well thought-out accessories to house all your gear in one spot.

The cons:

Instructions are sparse, took a bit of reverse-engineering to figure out the best way to assemble. Getting the holders in the right spot and even across both sides is very time-consuming and fiddly to get correct. No accessories for cable management - I wish there were some sort of container for the bottom to hold power strips and excess cabling. Can be a tip hazard if you aren't careful, would be nice if there were "official" counterweights for the back.

Overall, I would highly recommend this rack despite a few little frustrations.