Baby goes to sleep after 5 minutes when I use it, and it is well protected from external agitation, perfect for walking but also for big sorrows, I always wins in the stroller in case. Also great at home when baby needs a hug but one has to do.
This model was recommended by my midwife and I confirm that it does not hurt to back, baby seems to be in a good position.
I really recommend, it has simplified our life parents for now!