Hi all, this is my first post so please be gentle with me! I have a 10 day old baby girl and we invested in a natures nest for her after reading so many great reviews on the net, here and elsewhere. She seems content in it so far and sleeps well, but we're a little worried that with the curve to the mattress, her back is never straight (I put her in a rocker during the day, also curved). Is this a problem? Also, if anyone here has a natures nest, do you still put baby in the feet-to-foot position? We are doing this because we're frightened she'll wriggle underneath the blankets if we don't - but her feet seem to be a little higher than her head when we do this and we weren't sure if this was a bad thing or not. So if anyone who has used the natures nest could put our minds at rest or offer any advice, we'd be really grateful. Thanks!