First of all, I would like to say that this game is WORTH IT.
This game is one of the best JRPGs I have played, if not the best. I am rating it a 10/10 not because it is perfect, but because it is a masterpiece. No video game moved me as much as Xenoblade Chronicles did.
The gameplay is really fun for me. It feels so good to discover the right tactics, correct positioning, the right accessories/gems to wear, the most sound composition for a certain boss, etc. It's just so technical, and I liked it very much. Some battles were very easy because I over-levelled after doing so many side-quests but the challenging ones don't fail to surprise and leave me thinking of ways to be victorious.
The story is mind-blowing, original, and successfully glues together all of its reasons of being with logic. It's like reading a good book and you just can't put it down.
The music is very good as well. When laid out together, they create a unique experience that is Xenoblade Chronicles the same way final fantasy further built its worlds through memorable melodies.
The world building is phenomenal; it is very unusual, but pulled off exquisitely. The places were laden with beauty and care. The details the developers put into the world are spot on.
I loved the characters because they were "alive", logical, and will make the player really give a damn with what they want to achieve. They were unpredictable, and mostly outside the clichés of anime characters. The relationships between the protagonists are so wholesome that I often find myself smiling throughout cutscenes after cutscenes where they interact with one another. I also often found myself surprised with how events went for them.
Don't hesitate. Buy it, play it, and be amazed.