Don't expect too much and all will be fine...
I purchased this media wall tower as I already own 3 of the exact model and they hold my DVD/Bluray & CD collection (which obviously is quite extensive if I need 4 cabinets) quite nicely. They are cheap and do require some extra help from the user to be the best they can be, but compared to either buying something more expensive or designing & building your own storage unit it's well worth it. The added time & effort (albeit minimal) will save you $ which can be spent expanding your media collection. (LOL)
When assembling shelves, a little Scotch tape around the pins supporting the shelves to keep them from loosely wiggling in place (or worse).
In my media room, I have a wall where all 4 cabinets stand together in a row for easy browsing access, and it looks impressive. Each holds a substantial amount of media for the limited investment in the cabinets.