I don't do it very often, although to bw honest, I could very well do it once every week, on Saturdays. I slept a total of 12 hours or so. And I needed it, because last two nights I slept 5 hours each or so.
But people have very different sleep patterns. I woke up at 11am, but fell asleep again. Could have got out of bed, but it was so warm and comfortable, and I had no duties... I let myself fall asleep again!