Would this get an accurate reading on an 11 month old? Have you had any feedback from mums?

Hi Anja, 11 months old might be too small for the sensor to detect properly. Feel free to go into your local Baby On The Move and see if you can try one or find an alternative. Here is a list of our store locations here: https://www.babyonthemove.co.nz/store-locations/. Hope that helps