my only concern would be the ribbon or elastic becoming untied and getting pulled out.....is it sewn in to prevent a baby hazard? also....are they hot? i'd love to knit those for impending babies all around, but i live in florida and i'm afraid they might be too warm here.
the soaker is usually under clothing,and she is usually swaddled, so inaccessibility to the soakers makes that a non issue for me. also she is just a newborn and doesnt quite yet have the coordination to make her hands do much of anything. if she were older i would rely on the ribibng alone, but as a newborn, her teeny tiny waist needs the extra tie.
as for the heat, dishcloth queen is totally right. those plastic, and pul covers are synthetic and not breathable and therefore even hotter and traps in moisture. since i live in arizona, breathable fiber was a very important factor. the wool wicks moisture away from the diaper, which keeps the baby drier. also wool has some sort of antibacterial property to it so you don't have to clean them every after every use. i just let them air dry and they're good to go. as far as experience with rubber covers, i could only assume that they would be more likely to cause diaper rash, since they trap in the moisture instead of pulling it away from the baby's body like wool does. then again, these things really only become an issue if you plan on cloth diapering. other than that they're purely aesthetic.
here's the pattern:http://community.livejournal.com/punk_knitters/110889.html