I used it for mt 1st born and i will use it for my second one. the one I have is with the adjuster. the good point is adjustable and can be used until the bb goes to 2-3 years old. for those without adjuster, you need to chane from time to time according to your bb size.
I can help for how to use. if u r interested, pm me. i am living in kln side and still enjoy the maternity leave.