I use this to mount a Behringer Xenyx 2442fx (located in the top adjustable angle rack) with rack gear such as headphone amplifiers, gates, reverb, ect along the bottom rack. This comes with plenty of places to mount rack equipment and is especially useful if you have a lot of them. My band uses our own small set up for band rehearsal but being the drumming it was a bit awkward having the mixer in accessible reach to change any monitor mixes on the fly, luckily with this I was able to bring the mixer and the outboard gear much closer when at the drums and push it neatly away when band practice had finished.
I can also see this being very useful in a home studio set up that lacks a patch bay as it is much easier to move this around and get to the back of equipment than in a usual cabinet of rack equipment.
However there is an issue with this style rack, since its not a cabinet all of the cabling is on show so unless you have velcro cable ties it can look a bit messy and can often run over cables on the ground when moving around if you're not looking.
Another issue isn't with the product but rather with the manufacturer; it doesn't come with any instructions which does mean you have to figure it out as you go, but even with that it only took around 5-10 minutes to build.
Over all its a great product and very good price point.