My little man is a terrrible day sleeper. On Tuesday when I was at a friends, he fell asleep in my arms and I laid him on the lounge next to me - on his side. He slept for 1 1/2hours!!! - but I was sitting right next to him. I was at another friends today and did the same thing and he slept for a hour -again I was sitting right next to him. I know the SIDS recs say sleep only on their backs....but would a sleep positioner keep him safe on his side during the day? I would keep him on his back for his really deep night sleeps. I have an angelcare monitor as well - not sure if this actually makes a difference tho...

Has anyone used one? Opinions?