Trails in the Sky is a great story-driven rpg that mixes old-school sensibilities with a uniquely grounded setting. Said world-building is the greatest strength of the Kiseki series: I cannot think of another jrpg that has a comparable amount of layered lore and thought behind it's world. The story itself isn't anything mind-blowing, and takes awhile before the plot starts to reveal itself, I wouldn't say it feels slow-paced due the characters being strong enough to carry the game. Estelle in particular is a great protagonist, with a bubbly personality she doesn't lose even as she matures in her character arc. The game can be pretty verbose at times, but the writing and localization is sharp to justify this. The script is the game's strength.
The battle system is decent, although is a step too slow for what it is, and random battles are too easy half the time. And the music, with a few exceptions, is fine but not as good as Falcom is capable of.
Score: 8.5 (Great!)