I think mine worked - although I left it at home! It was more about getting it set in our minds what we wanted and didnt want - so even though we didnt have it with us,as issues came up we knew what we wanted - eg. I had to be induced and told them to start slow, even though it was a c/s DH got to cut the cord, i got skin to skin and bfed straight away, got in the bath - drip and all etc.....
Just be open and flexible - knowing that it may not go to plan - I wanted a v/birth with gas only, in the bath, and i was terrified of an epidural - I got the bath but gas made me sick and 26 hours after being induced i asked for an epidural, and Izzy was born after 36 hours by a c/s!
Good luck hun!