I have been using cloth diapers since my son was born (he's 2 now). I'm a full time working mom, so I made the choice to use a diaper service and diaper covers, which works quite well for us. We bought about 7 or so covers, and rotate through them, washing them as needed, and we let the diaper service handle the big messes.
In the beginning I tried several different diaper covers, but have found these to be the best for my son. They seem to fit pretty true to size (he is 28 lbs and can still fit a medium which is for 15-30 lbs). He's never been a real chubby guy, always pretty average in...