I have personally owned some of Valors products... I had 2 of their LCDs in my headrest, and one flip up in dash DVD...THERE STUFF IS JUNK!!!! every single item had some major problem withing 6 months...and forget getting any service from Valor...
as far as the DVD changer...a buddy picked one up and also had problems with it from day one!... STAY AWAY FROM VALOR. I can't believe Crutchfield sells it...its got to be a major head-ache for them.