We just bought a couple of these to replace blankets/grobag as dd's arms were always freezing in gro bag and she would often kick blankets off. Are they any good? She looks very snug but was pretty chilly in just vest and the suit so we put her in a baby gro, now I'm worried about her being too hot! Our room hovers around 18 - 19 degrees. I've never heard of them before today so keen to know what people think of them.