Rikki, I made a point of listening to the Vocaloid software knowing you were interested in hearing about it. It really is very impressive. NAAM really isn't the best place to judge sound quality without headphones due the the general noise as you would expect. But what I heard from Vocaloid was very impressive. Most of the demos they played were of a real vocal track with Vocaloid singing the synthetic backing harmonies but they did have a couple of demos that were done entirely with Vocaloid and they still sounded good. While I'm sure with headphones you would be able to pick that a solo Vocaloid vocal track was synthetic, mixing it in with other vocal tracks was very convincing. Application of vibrato and volume effects on the vocals also seemed to be very easy. Software is certainly getting a lot better.