This will not contain spoilers.
Re:Zero was enjoyable in a way many praised titles that I've watched couldn't even get close.
The world is fantastic, creative and very entertaining. The story was confusing at times, but it wasn't long until I was back with its pace. Some of the MC's decisions frustrated me, but in the end it all came to light. Those two factors made me realize how different storytelling is in the West, but they didn't reduce the quality of the story as a whole. The romantic couple that came of it wasn't the one I wanted. I'd give an arm just to see a romance between Best Girl™ and the MC, but it won't ever happen. Still, it would feel unfair to give the Story anything short of a 10.
Although I don't particularly pay attention to the art, it wasn't bad in any way. Sometimes some of the 3Dish animations felt out of place in 2D backgrounds, but that was not a concern. In this season (2018 Fall) I see many works that give me the same feeling, so I assume it is common. Art deserves a 9.
I liked the OPs and EPs a lot. The broken japanese pronunciation of English always gives me an unintended chuckle. As for the anime, no soundtracks felt out of place, and some of the drama background pieces will haunt me for the rest of my days. Sound deserves a 10.
Now, some spoilers. You've been warned. --------------------------------------------------------------
The story did not explain why the Witch of Envy was connected to the MC so much. I wish the anime had explained that, but I guess it'll (hopefully) happen in the sequel.
Only one character felt lacking to me. The anime tried to give it some personality, but I couldn't grasp it. Emilia. I have so many questions about her, such as: Who are her parents? Her backstory? What did she do before she became a candidate? Along with some others.
For that, I give the Characters a 9.
For that, the anime gets an overall of 10. It is a great work and I recommend it to anybody interested in the genre.