M.T.
I used the Cocoon Sleeper, and LOVED it. My son slept in it from day 1 until 6 months when he became to large for it (he weighed 25lbs and was about 29") It was very easy to put him back to sleep by gently swaying it. He had reflux and it helped a lot with that issue because he was able to inclined slightly as opposed to flat on a mattress. My sis is now using it with her new baby and loves it as well.