Episodes 1-3 on Disney+ as of yesterday, weekly on Wednesdays from then on.
For my 2 cents, it's pretty good so far. It's established a fair chunk of back story for Cassian already, sets the tone quite well for how things were on the fringes of the Empire, and touches on some stuff that's mentioned in the book 'Catalyst' and in 'Rebels'. It certainly comes across as a higher value production than the other live action series' so far, though perhaps this is just because of the more detailed, higher contrast locales they're in.