I'll give it an 8/10. It took a bit to get into the show and it started kind of slow. The characters seem very generic at first but they grow on you. It feels very realistic for an isekai situation where you follow the B team rather than the A team, and you learn of the struggles of a normal generic party of adventurers. I enjoyed the nice plot development and character building the story did and look forward to continuing it in the LN's. I have to admit though, it did feel VERY slow at first.

It doesn't start with anything novel or extraordinary. You follow a standard party as they begin their journey in a new world. Everyone doesn't have anything unique or noteworthy until the slow scenes help build their character and personalities. As I learned about their flaws and personalities, their inner demons and their inner fears, I learned to like them as characters rather than generic protagonists. By the end of the show, I can attest to the fact that each character feels like a unique individual with a genuine (albeit sometimes a little one-sided) personality.

This isn't your standard isekai where the main character goes on a grand, life or world changing adventure. It's the story of how a group of second rate adventures grow as people when they wake up in another world with amnesia. It has high character development and nice animations so the quality is there, and I feel the fact that it does something different from the norm is nice in and of itself. Also, this is a surprisingly wholesome anime in my opinion, so I give them props for focusing on the character building rather than earning easy fanservice points.

my personal rating:
10/10 character building (characters feel unique by the end of the show)
06/10 world building (might be shallow, but what we're shown it's 'enough')
08/10 animation quality (I personally enjoyed the watercolor style artwork)
07/10 plot/story quality (good, but not great)
06/10 pacing (felt VERY slow for the first like 3 episodes but it fits the overall flow of the show)
~rounded to an 4/5, or 7/10

I give it a 7/10 on uniqueness, it's a good watch and was well worth my time, nothing too memorable but I enjoyed it in the end :) I'll probably read up on the LN and post an update to this review if I get around to it afterwords to compare it to the source LN.