DIY easy to assemble you only need a philip screwdriverlooking great and the colour suits my garage floorings.I just thought it was a total of 6 trays plus the top featuresand proved im wrong but all good....what you see is what you get.On my quality side point of view not just sure...think might just have to put light stuff coz theres only two long screws to connect both sides so if u put too much stuff i reckon it could break easily and common sense dont try so it could ruin the assembly. The four wheels looks fine slides lightly and smoothly though theres no lock or stopper feature. Hope next time the manufacturer will improve and add a locker at least one each side. So visually overall 5 stars but quality and longevity see how it goes and will try to pop in for my next review.