Very nice quality - I could sit on it myself it is so strong! My cats checked it out right away and love the little cubes. There is a design flaw though- the top surfaces of the cubes are slippery! My younger cat slipped and had to take a moment to recover from his slip and fall, so I hope that he is ok. These surfaces need something - carpet, fabric, felt? I'm going to the fabric store to find something to tape or glue. One more thing! This unit is LARGER than I pictured in my space, so be sure to measure.