Hi
I got my little girl one at about 4 1/2 months old. She was holding her head fine before that but I just waited a little longer. She has had an absolute ball in it!!

She gets excited now when I start to put her in it and starts jumping before I can do the strap up

My sister had one as well with her two daughters and my SIL has one for her son and they all love it, NEVER been any problems whatsoever.

I would wait till your little one is a little bigger though.......Have fun!