Hi,
I hope my response doesn't come too late. The response depends on the age of your child, I guess. I have both the NG ergo and the old patapum. I started using them when my child was about 9 months (my child was very small then). I've never found a huge difference in comfort to justify the difference in price, and there are things about the patapum that I actually like more. It's less bulky, weights less and takes up less space. But now myson is 25 months and he sorta looks squished in tte patapum, but it's equally comfy.
HTH
Diana
Mama to Andrés, born 07/07/04