I’m approaching one year breastfeeding with nipple shields.
My baby had/has a high palate and this is what has always worked for us - thanks to an incredible midwife who suggested I use one in the middle of the night after my son was born and wasn’t feeding. In the early days, despite my son gaining weight very well, I heard horror stories about how bad it was to use shields and how, at the very least, they should only be used as a temporary measure. I knew I wanted to feed to at least a year if possible and so spent a lot of time Googling to see if this was possible with shields and had real trouble finding any examples or experiences. So I promised myself that, if I made it to a year, I would add my story so that other women searching in the middle of the night on zero sleep might take comfort from it. Trust me, it absolutely is possible and remarkably fuss free. I plan to continue until he wants to stop.
No expert but happy to answer any questions if people have them.