My DS loves it, always smacks himself in the face and wakes himself up if I dont do it. However, last night he wriggled so much that when he woke me for a feed he had covered himself in the blanket , scared me to death. However the blanket I used was a bit too small I think and he wasnt weighting it down properly. Seems better this afternoon in a big cellular blanket. I've looked it up today and book says to stop when they are "more active". When's this? DS is 11 weekks BTW. Thanks.