It looks like quite a few of us are using this software so maybe we need a thread for it.
I just found this short on YouTube of a voice I had not encountered - Kevin.
Kevin Yes, it's an amazing piece of software and has opened the door for me to write songs with vocals again without depending on unreliable pitchy vocal divas.
My last 10 or so songs have all been done with Synth V.
I own Kevin but am a bit disappointed with it, at least for the style of music I write.