No personal experience regarding returns but according to their return policy, refund is issued only in the case of DOA/In-Transit damage (You might get it for OOS reasons too)
Orders once delivered cannot be exchanged. In case of a manufacturing defect, please contact the Lenovo service centre immediately and the Lenovo service staff will guide you on the next steps with reference to the replacement of the product. We will not offer replacement to customer for any Dead on arrival/damaged in transit case, customer will only get the full refund.
We are unable to process refund once order is delivered in a good condition to the customer