Spent my first night under the stars with my 4 year old daughter in this bag. Dew was heavy in the first half of the night, making our bags very damp ; the outer shell was completely wet. And then, everything froze solid. Yet, with bare legs and a thin fleece shirt, my girl slept through very comfortably, and in the morning she loved spending time in her frosted up yet warm sleeping bag. Very good performance for this synthetic bag, way above my expectations. My only downside is : it packs as large as my adult synthetic bag. I don't know if the switch from 130cm to 170cm is very useful, given that synthetic bags often lose a bit of insulation as they age, I may buy another one by the time she needs to switch anyway. It would have packed smaller and lighter without this extension. Apart of that, I'm perfectly satisfied, and looking forward for more time out with my daughter !