Let me start by saying Isekai no Seikishi Monogatari was quite the watch. The MC was extremely refreshing to see in this specific style of genre; being self sufficient, strong, dependable, funny and a bit weird. Without spoiling it for you I can say this is a must watch with the way this show develops. The action scenes and story line are very good and although I do think they could have gone more in depth with the mecha portion of this show and revealing more about the different nations and factions it did a great job wrapping things up and keeping the show on point. The characters themselves aside from the MC are very lovable and each one has a very interesting persona and they each aren't overwhelmingly needy.
Without a doubt if you are looking for something fun, interesting, and enjoyable give this anime a whirl, you won't regret it.