It depends on ow you feel about the possibility of having a chid with either one of these disorders. Can you cope with it? Have you ever confronted anyone with those disorders? I would want to know what the chances are that your child may develop either disorder.
I have worked for years with both of those disorders. They can both be treated but one needs a strong family to help the patient get through rough times. I have met women who actually opt to adopt rather than pass the illness along (bipolar). What we do know is that it is genetic and I have seen several families with members having the illness. There have been many studies on this which you can easily access through pubmed.com
That said, my personal decision would be not to use a donor with a history of mental illness. I don't have the financial resources to help a child the way I would want to (private care) should they develop the illness.
I do think it is great that the donor was honest with her psych history. We chose a clinic that did very intensive psych screenings and we paid extra to have our donor retested.
Good luck..not easy to pick a donor.