Ive got a nurture sling (one shouldered) a bubba rocks (a wrap-style) and a baby bjorn - the nurturesling is sooooo great - much easier on my back than the baby bjorn, and my bub loves it I got it on ebay, but they also have their own website. It was only about $25 brand new, on sale! Bargain!
I havent used the wrap much yet, but its great so far