Since having a baby last year, I have found CBeebies invaluable.  The quality of the programs is excellent and the material is so appropriate for each age group.  The presenters are enthusiastic and passionate about their jobs and this shows through.  Children respond to them and learn.  The programs are not overbearing or too heavy on the morals, like with American programs, but they do each nice principles and ways to children.  I am more than happy for my daughter to watch CBeebies as all the programs are enjoyable and appropriate and they are not swamped with advertising. This is something that you really appreciate, no adverts (this applies to adult viewing too).  I would like to see all advertising banned between children's programs as it can lead to greed. 
We are currently living in America for a  6 month period and we certainly release the high standard of children's (and adults) BBC programs and our daughter is captivated when she can watch the English children's programs and shows no interest in the local programs. 
Keep up the good work BBC, especially your digital channels, they are quality.