The writing is a 6 or a 7. At times it's eh, at times you say "This is better writing than shows like SAO". It's just inconsistent. The animation is also wildly inconsistent. Sometimes it's decent. Sometimes you see a door blown up behind a "magic barrier" 4 scenes before that actually happens. Quality control on this show was not up to par. The characters are fairly likeable. The constant throwbacks to episode one are an annoying trope of isekai anime that I could do without. Just imply it. Stop constantly flashbacking and ghosting inyour "past self" for no other purpose than to remind the audience that you lived a past life.

The show has a good direction though. I'd watch a second season.