I'll chime in with a different opinion and say that DS and I loved the Bjorn. He has always been so happy in it. It did start to put more strain on my back as DS approached 20 pounds but we more than got our money's worth out of the Baby Bjorn. I tried other carriers with DS, but he always preferred the Bjorn. I found it very easy to put on/take off by myself. And, it washed nicely. I have no complaints.

Other options include adjustable slings, pouches, adjustable pouches (like the Kangaroo Korner fleece pouch), Wilkinet, Baby Trekker, Theodore Bean and Sutemi.

I would stay away from the Snuggli and slings you can buy at mass merchandisers.

Here are some links to different carriers:

http://www.kangarookorner.com/index.shtml
http://www.wilkinet.co.uk/
http://www.babytrekker.com/
http://www.epinions.com/kifm-Baby_Eq..._Carrier_1MNBL
http://sutemigear.com/