S.
hello there,
my daughter couldnt take the tray off but she would bang her head on the back of the chair and also if i did not put the brake she would move her self around.
I have one of those chairs that attaches to the table and it works great. it has a seat belt that is impossible for her to stand up in and she cannot bang her head anymore. And i think she really likes the idea of sitting at the table with us. its kind of like having a highchair that attaches to the table.
pretty cool.
Good luck, i hope you find something that works for you.