The two main points of an anime are Story and Art. However, in this case, the art doesn't stand out and the Story leaves me with a bad taste.
The only reason why this anime is mildly entertaining is simply that it's MMO setting and that the character is always overpowered. Emphasis on overpowered because it's justified with the Cliche "Because I maxed my def." In order to create a good story, it has to be logical and sound however justifying every situation with a 'trump card' that she acquired from her previous journey or her absurd def doesn't stick well with me at the beginning nor the end of the anime. It feels as if she was simply designed to be overpowered and the fights felt artificial because she can practically one-shot anyone (don't forget she's a tank). It's as if she only uses her abilities when she's forced into the corner even though she could instantly win any fight if she just used her trump card at the beginning of the fight. Somehow through the balance of this MMO, she was able to create a character that is both offensively superior and Defensively superior to any player in the game through anime plot.
When you jumble slice and life and stupidly overpowered, the anime just feels like a typical disgusting plotline like "I spent 300 years killing slimes and became max level," Moving onto the characters of the anime, it's hurtful to say but the characters lack foundation, they're easily forgettable and introduced in a rush, perhaps its hard cement 8 different characters in 12 episodes, but none of them felt meaningful but simply served as a role of 'one of her friends.' A rating of 4 is slightly harsh but I personally felt like I wasted my time, the music and scenes were definitely bright but Art alone doesn't help with how plain this story is.
I don't recommend this to anyone unless they're bored out of their mind and just want to watch one of those strings of Isekai/magic animes that have been coming out.