The ingredients are different in different countries.
If you are trying the UK version, it is ok but not brilliant. It didn’t work at all the first night and left me feeling hungover the second night.
If you are trying the US version, it is very, very gentle and didn’t help me fall asleep initially but it did mean I fell asleep very quickly when I woke up in the middle of the night. And no hangover!
(I still prefer Zopiclone).