Very entertaining. I've gone to the most recent chapter and enjoyed all of it. The writing quality is top-notch compared to many stories on this website, and even then, the grammar and sentence structure is excellent. Nothing like reading a formal paper, but definitely has higher quality than most novels I have read. Stability I can't say much, but I would say for the length of the chapters, it has a reasonable update schedule. Story development is also worthy of a 5/5. It's not too fast, or too slow. And finally, the last two can be combined for a 5/5. The designs and feelings of both the world and the characters don't feel 'robotic' or 'bland', and also do not follow any of the super-common tropes.
Overall, the story is worthy of a 5/5, and hopefully, the author keeps up the good work!