I have few myanmar maids, and met some good ones too. I had good ones and so-so one, and a bad one too. all up to your luck in getting a good one, all other national also same. my friends had problems with her pinoy maids.
If you want reasonable good myanmar maid, best get those who are graduates, at least the english is still ok and more sensible. But the thing is, I realise those graduates, some of them came to work as maids first, but will look for opportunity for other jobs, once they get the connection, they will quit on you and apply for S pass to come back here.