Had to go to another site to actually read this. It's actually pretty good if you don't mind the fundamental logic that ensure MC always wins. Just speaking in general, you can expect a few conceits that dictate everything:
1) MC will find ways to combine old knowledge with new so he will eventually be better than natives at their own power.
2) MC will be ruthless and vindictive, and it will only lead to better results, never worse.
3) MC has the money and inclination to reward people who voluntarily side with him, which lets them overlook 2 above.
4) MC doesn't know everything but will always plan better and even if surprised will have contingency ready.
To be fair, the statement above are not necessarily criticism, and the story does what it can do justify him simply being intelligent and anticipating problems, so it feels much less like an asspull than it does for many stories. But if you're wanting a story where MC faces genuine adversity or has to deal with the negative consequences of his choices, this story might not give that to you. Justified Mary Sue is still a Mary Sue in the end. I can say that I do prefer this methodology over the kind where the villain is ALWAYS two steps ahead of the main characters and the only reason the villain loses is an asspull.