I have a hug a bub which I used quite a bit when Oskar was younger... he wouldn't sleep during the day unless I was holding him and it was great for that as I was completely hands free because of the way it "ties" your baby to you. I had a similar holder to the baby bjorn but found it very painful. I have just bought a baba sling (haven't received it yet) as the Hug a bub just isn't so practical for me now... such as at the shops and he wants me to carry him - he's too heavy for that but he wants to be up and down so a sling is faster and more convenient now.