I got quite mixed feelings about the ending. I guess the author chose an obvious choice but the development was surprisingly good. I won't call a masterpiece but it's a great manga piece.
So far so good but it takes much time to release new chapters. It's like a manga that I forget for half a year and then I remember and read everything in half an hour.
Quite frustrating... same old isekai mainstream idea but poorly developed. The main character doesn't have appeal and the plot doesn't evolve. When the story starts to improve the chapter releases stop.