A prenup can be a useful tool for determining how assets should be divided in the event of a divorce. If both sides can agree on a prenup, it can save time and money in the event of a divorce as long as both parties agree to be bound by the terms of the agreement.
If you feel that your interests have been represented, and you have assets that you wish to protect in the event of a divorce, you should sign a prenuptial. However, before you sign any legal document, it is often helpful to have an attorney look it over.