Easily installed on car seat, and we too freaked out thinking “How do we take off the adaptors??” My Son is now almost a year old, and I sadly am putting him in a larger car seat.
I’m pretty positive the adaptor manual tells you how to remove (red button at handle if you pull back car seat fabric), but the questions/answers section will also tell you.
No need to tell others you’re stuck with the adaptor… just read folks, it’s a good skill.
Anyways, I digress. These adaptors work for the purpose they should, and it’s also pretty clear what stroller models they won’t work for.