I was unsure about buying the box spring for our new hybrid mattress on line.  I read the reviews and the descriptions and choose this one.  We put it together with the tools included in about 30 minutes. We were very impressed with the quality and sturdiness of the item.  Getting the cover on was easy once we found out that pulling it did not rip it - it has a stretch to it. I would recommend this box spring.  We bought a king. Very pleased with it.