yes we have put the bumper on since about 7 months, and i also have about 5 or 6 bunny rugs in her cot and blankets around the edges so she doesn't hit her head, and she has about three small stuffed toys..... no ribbons or strings or anything like that to pose a strangling hazard though...

in my opinion once they are able to crawl and sit up and are not little newborns anymore, i honestly dont think a blanket or toy is going to pose a suffocation hazard. she buries her head into the bumper or into a blanket and goes to sleep that way, always with her head right up squished against the edge or end of the cot. funny little things arent they!