NWR- Aveda Hair Dye

Has anyone had experiences with Aveda's hair dyes? I'm looking into the Full Spectrum Deposit-Only Color Treatment. It's supposed to last around 8 weeks. I dye my hair black (it's naturally very dark brown) and I would rather not have it dyed for the wedding since I'm having it pulled back and it's easier to see depth with lighter hair. But I think I'll be ok for the wedding.