Cupcakes,
Absolutely I've done it and absolutely it was helpful and very well received! Who knows your child better than you? I think it's very, very helpful for the health professional to have the history of medications, early development, familly social profile, past medications, past treatments, etc. It's like taking a couple modeling photos to a modeling call. It's a snapshot of who your child is.
And, word of wisdom, I believe that archived information suggests not trying to complete it all at one time; I agree. I did an outline with mine and then would go back and fill out sections. I worked on my difficult child's report over the course of a couple weeks - that was about four and half years ago. Every now and again when something changes (an improved behavior, a new medication, some new breakthrough with behavior or academics, etc.) I update it.
Definately worth the time and love.
Sharon