Yes, it is OK to sleep in a recliner every night; however, only if you feel comfortable. An oversized lay flat recliner can be turned into a bed easily by adjusting its backrest and footrest.
People who suffer from sleep apnea, back pain or sports injuries can sleep in a recliner every night. Sleeping in a recliner every night is especially good for those people who are recovering from surgeries. It helps to fast asleep as compared to bed.