I'm half way into the first episode, and I can't help but feel that this is a crossover of Batman and Starwars. The Mandalorian character is seriously giving me Batman in Space vibes.
Edit: After watching the entire episode, I still feel that the Mandalorian character could be Batman in Space. The Star Wars world is well represented. Any Star Wars fan is going to squeal over many of the background details and costuming.
Is it great storytelling? I'm not too sure yet. Lucasfilm gave us a brief series of flashbacks and one line of dialogue to establish that the main character suffered as a child and was apparently orphaned. Overall, if we stripped them of their space tech and put them on horseback, this could have been the beginning of a Spaghetti Western.
Summary: I'm giving a thumbs up for the setting, costuming, and Star Wars theme. I'm hopeful that future episodes give us a solid (and memorable) Star Wars story.