Well it's a lightweight rack.
Nothing too flashy or bomb-proof. Plastics are of good quality, no warping, the lids close nicely and firmly. Love the shallow depth as it makes a world of difference in how evenly weight is distributed. Also looks great on a guitar cab.
As others have noted, the rails system leaves a lot to be desired as it's pretty much threaded steel blades that are held in place with the devices you rack on. Works ok, but takes a bit of extra care to get alignments right. Pro-tip, screw everything you need loosely on the rack, align to perfection and screw tight.
All in all, a solid choice for the money.