This is very cool, but from one Mandarin learner to another I’d caution against relying too heavily on any external feedback mechanism for improving your pronunciation.
If you can’t easily hear your pronunciation mistakes so clearly it hurts, consider putting more energy into training your ear. Adult language learners usually have brains that have become resistant to, but not incapable of, changing the parts of the brain responsible for phoneme recognition. The neuroplasticity is still there but it needs some nudging with focused exercises that make it clear to your brain exactly what the problem is. Minimal pair recognition drills, for example, are a great place to start.
It’s not the most fun task, but it’s worth it. You will tighten the pronunciation practice feedback loop much more than is possible with external feedback, so a better accent is the most obvious benefit. But beyond that, it will make a night and day difference for your listening comprehension. And that will get you access to more interesting learning materials sooner. Which hopefully increases your enjoyment and hence your time on task. Plus, more accurate and automatic phoneme recognition leaves more neurological resources free for processing other aspects of your input materials. So it may even help speed things like vocabulary and grammar acquisition.