Should doctor assisted suicide be legal?

Doctor assisted suicide provides a valuable life service and provides safeguards for those wishing to end their lives.

Allowing doctors to assist in suicide provides a means of oversight. By making the process legal, components such as counseling can become a part of the process. Moreover, a doctor's assistance will ensure success, thus eliminating the fear of serious injury (without death), and a lack of suffering. For some people, especially those with chronic pain or terminal illnesses, suicide is a solution that is ethical in and of itself. Allowing doctors to assist in the process should be legalized. I would like to hear what other people think and why.