My LO is 20+ lbs so I def do not "need" the infant insert anymore. I removed it today, (not because he out grew it, it still fit. But, because he got too warm).
I haven't removed the head/neck support though. I know it goes with the infant insert, but it looks to me that it is more safe to leave it in for awhile.
My husband hates it because he says it makes lo looked squished.
When did you take it off? How many pounds was LO?