I want to agree, but I searched on their website and found their narration service with 2 full book examples. I listened to the first one for a while and it's the first time an Ai narrator was good enough to keep me listening: https://www.audiostory.ai/2065785/11707800-alice-s-adventure...
Yeah, as I mentioned I work in TTS and agree with you. If this is legit it is pretty amazing. Certainly would put them as one of the top providers especially given that they could ramp up voice selection. Also, if they truly are training on random stuff they would not have to pay royalties to voice actors since these voices don't exist. This is on par or better then most competitors i am aware of.
