Without the resources to do a study to see if the quality is actually better or worse than other options, these open-TTS models must be judged by what you think

Without the resources to do a study to see if the quality is actually better or worse than other options, these open-TTS models must be judged by what you think of their output. (That is, do your own study.) I've found some of them to be surprisingly good. I keep a list of them, as I have future project ideas that might need a good one, and each has its own merits. I'm yet to find one that does good spoken informal Chinese. I'd appreciate if anyone can suggest one!