In my opinion it's good. You will find fairly good rating at IMDb and rotten tomatoes. Most of the audience is saying it's not worth watching. But I bet that most of them haven't even watched the prequals like star wars rebels and clone wars. If you haven't watched any of them, it's like going into the 11th season of a story straight. Yes, I know they are animated but this series is all sequal to those events only. I found fairly good though. Specially they must watch it if you have seen rebels(more important) and clone wars.
[SPOILER ALERT]
the thing that I don't like about it is when thrawn comes back, ahsoka was clam like nothing has happened. She says ≈" Ezra is where he was meant to be and we are also".