It's the best Star Wars television series, save that Mandalorian (for me) is nipping at Andor's heels.
From a writing perspective, I enjoy that Gilroy is scripting as though the audience have a degree of intelligence. Exposition is kept to a minimum, conclusions from viewers can be made, assumptions correctly guessed, and that is a statement to the writing and directing actually having a unified collaboration.
Writer sets a scene tone, a goal, the director makes it happen. The pacing is on point, and I know critics have complained about it being slow, and 'not much happening' in episodes, but I disagree; presentation of action or movement does not only equate to development, sometimes showing an episode intermingled with people, locations, interactions help drive home latter narrative pay offs.
Like the alarm bell guy? I don't know who he is, but I really like him. He loves his job and I respect that.
Like the 2 episode build up to the heist? It got me to care about the other characters involved, maybe not to the same degree as Andor personally, but enough so that when deaths or betrayal happened, I thought 'oh shit' and felt something. There has been none of that for other Disney SW shows or movies for me, so far, post-Rogue One. Except in Mandalorian, when Kuiil died trying to get the child to safety on the ship (via the Imperial scouts).
I also thoroughly enjoy that Andor is unapologetically ruthless, and that that theme has been maintained from Rogue One. He's a mercenary, first and foremost, a survivor. That will likely develop into his dedication to the rebel ideal throughout the rest of this series, but I like that it's recognized as a core component of the character without being influenced by the rebellion. The rebellion gives Andor a goal, it doesn't radicalize or alter him into an anti-hero, because he already is one.
Someone crosses him? Andor shoots them.
It's refreshing. It's gritty. It's lathered in a greater level of writing without being needlessly fan serviced or overly reliant on throw backs. No stormtroopers? No problem, there has always been more to the Empire, not just bucket heads. Seeing more inner workings of the ISB has been a treat, and I'm really looking forward to seeing the involvement with K-2SO and subsequent banter.
As I mentioned above, Mandalorian comes a close second.
Beyond that, the rest has been hot garbage made for consumption and character assassination (Boba Fett was treated criminally in 'his' series), and that includes non-SW shows as well.