We use a Sleep Sheep right now for white noise. I don't know that it makes a big difference - LO sleeps about the same without it. I was thinking I'd try a white noise app on my phone and leave it on all night to see if it helps. LO is 7 weeks so we are not trying to get her to STTN exactly, but I'd love longer stretches & deeper sleep. A lot of times when I put her down after rocking, she wakes right back up.