Are these good too? Any recommendations? It would probably not be for long walks, more for school run and round the house, DS's music class, etc. It seems that wrap slings get the best reviews, but I just don't know if I fancy one. I like the idea of just popping a sling over my head, but I don't know if a. they are as safe as a wrap sling? or b. whether they are comfortable just being on the one shoulder.