Question about Moby wrap?

I found the moby wrap great with my newborn, but more difficult as he got older and able to move around more. By about 6 months I switched to the Ergo Carrier. One thing to consider is that if you haven't 'worn' him in the past, he might be a bit resistant to it now... not sure! But I don't use the moby with our 9 1/2 month old just because he wiggles around so much! I also did find it a bit difficult to put on to a point where I felt it was secure to hold the baby. Good luck!