Objective rank 5/10 or 6/10
Personal ranking: 7/10
I recommend this isekai anime because it invites a semi-raw experience as you watch your 'generic op MC' go on an adventure in a fantasy world. The MC is certainly not the most interesting fella in existence, but what the show promises on, it delivers.
One of the greatest issue of this show, in my opinion, is the pacing. A lot of people will find it not so good. Aside from the MC, the other character you meet seem equally boring and 1 dimensional. Perhaps the whole world and the 'plot' is also boring...
Yet, if you're willing to immerse yourself into the isekai and go in without high expectations then this show will certainly entertain you. What I appreciate here is the MC and his genuine bonds with his familiars. It's a chill and passive relationship, maybe not a strong relationship but it's better than nothing when you're an ex-black company employee who overworked himself to death, finding yourself woken up in a fantasy world, then discover that you possess overpowered magic from an ancient Sage... what do you do? You go on an adventure, a type of adventure without a strong purpose except exploration and personal fulfillment for the MC. It's a type of adventure I wouldn't mind hopping along with.
Something which the anime could've done better is the portrayal of the MC. You get some blurry flashbacks but I am afraid that's not enough for some viewers who might not instantly register the kind of life (black company employee) the MC had previously before his transmigration. The way this isekai works as an isekai is that there is a good reason why the MC is a dull character who seems like he has a boring personality. I'd rather portray it as "a tired dude just wants to live well and is trying to learn how"
The show and the animation itself is sometimes awkward. But it's this type of awkwardness that might've been intentional, or probably not. Either way, I personally like it because it contains a "raw" charm to the show. It's the type of show which might have some epic music in the background but for the overall adventure, it's atmospheric. And for some odd reason... the seemingly lackluster supporting or background characters you encounter each episode alongside the MC... they feel a little more 'alive' and immersive because... maybe it's because the MC is dull? It balances out in the end. And maybe that's part of the reason why this show is unpopular, it's too mid.
If you're looking for something very unique or high-quality, then this is not it. But if you want to watch a "good type of generic" isekai, then this is something I recommend.