I think such extraordinary effort demonstrates self motivation, ability to learn and work ethic, especially compared with most of my peers who have just a BS/BA or a MS.
However, many times during interviews people asked "did you finish the degree?" I hate it!
I put "MS canadate" on my cv. When asked, I said "purpose was not to get a 2nd masters degree, but to learn what I wanted for my work and career development". Is there anything you would do differently?