These are solid shelving units. I picked up three earlier today to add to my spare room. For the price you can't go wrong. Easy to assemble, sturdy and light. Bonus points for being unfinished (will probably paint them in a few months).
The only thing i can suggest is that you give them a quick once over in the store to avoid buying one with splits or cracks.
THE ONLY PROBLEM I HAD WITH THE PRODUCT IS THE HEIGHT I NEED A FOUR SHELF NOT FIVE NOT THREE .... MY LOFT IS AT A PEAK IN BEDROOM SO THE WALLS ARE ARE ON A 90 DEGREE ANGLE ON BOTH SIDES.