I watched the first two series of The Mandalorian and thoroughly enjoyed it - at the level of a series of (nearly all) well-crafted and exciting individual adventures with a satisfying and deepening emotional arc.
I didn't think it would 'work' having a lead character who wore a helmet that he 'never' removed; because I though that I would not be engaged by a blank-faced protagonist. But maybe the difference was that The Mandelorian's 'co-star' was the animated puppet 'Baby Yoda' who was so cute, and his behaviour so endlessly-fascinating, that I would be happy to watch him forever!
The production values were superb - much like a Star Wars movie; The Mandelorian's space ship, in particular, was so rugged and beat-up that it seemed real, and was almost like a third member of the gang.
For me, it was perhaps (along with the original trilogy and Rogue One) one of the best Star Wars Universe things that I have seen: time will tell.