Refurbished Guitar Hero drumset was described as "100% guaranteed to work". Part of it did not work at all when we received it, so we had to pay another $28 to send the part back. They eventually replaced it, but ignored all my requests to refund the shipping cost. It was a lot of work and for what it ended up costing us, we could have bought a brand new one with a little more money. I will not ever purchase from this company again.