The anime was very enjoyable to watch, although I must admit I didn't like it very much the first time I saw it. This could have been to the fact that I was 12-13, whcih says something. I think this anime is better for an older audience, because some of the themes and context is very heavy on the younger viewer. However, I think that if you know your anime and you've seen this, you will have to agree that X is brilliant from the very beginning down to the very end.
Depending on the type of anime, I don't usually find a lesson. This was a dark anime, but one which was also clearly put. It had a bit of Princess Mononoke in it, because the Dragons of Earth were trying to cleanse the planet. This was somewhat of a lesson to us to take better care of it or it might be destroyed one day.

Pretty good anime, very hilarious to watch.
"I saw kids who were harassing a turtle, so I had to help it and that's why I was late!"

The only problem with romance comedies is that the atmostphere starts out nice and pleasant, but tends to get heavier and more serious as the realtionship blossomed. This is exactly what happened in this anime, but I suppose you can't blame the creator after what Shuichi and Yuki have been through.
Now, to talk about the relationship itself. Yuki is the dark kind of person, and Shuichi is the light happy one. I've seen these two very opposite kind of people get together before in anime such as Naruto in the love triangle.

Overall, the anime was awesome. From the very beginning that Kiba stumbled into town to the very end of the anime when-I loved it all. The presentation of the anie is very nicely done, and you really sympathize with the characters as they go along their journey to Paradise. Quite njoyable, I also like the lessons the show gives us (won't say anything) rather than just the mindless watching.
What I also love about this anime is the Russian. I've seen it quite a few times, from signs to books to maps. I was a little surprised to see Russian too, because I'm used to seeing Japanese kanji and things taking place in Japan. This was definetely a nice twist to the whole thing, and I think artists should try to incorporate other languages in their anime like this one has done.