Up to much lately?
Either 'yes' or 'no', I advise you to buy this. It's inexpensive and the money you pay for this game would most likely prove a worthwhile expense on your part.
Spirit Tracks can keep you occupied for short or long periods of time (and I know from experience, as it has kept me playing it for hours on end some days).
Musical scores in this game are wonderful. You may possibly hum the tunes that are played even when you're not on the game, they're that catchy.
Spirit Tracks' story (from an emotional viewpoint) can be strangely evocative at times, as it seems to put much more emphasis on characters and the relationships/ attachments they have to one another. I drew close to tears at a late stage in the game (not through frustration at a boss or something but due to sheer happiness at the outcomes later on, and how far I'd gone through the game) and seemed to have developed an attachment to the characters.
'Involving' is how I can accurately describe the gameplay. This time the DS engages you and you don't engage it. None of the tasks you are asked to do in the game play as if they are chores. All tasks that it gives you are original.
Overall, it is better than its former (Phantom Hourglass) and continues to lift my spirits even now, after completion. It's perky and engrossing as are most Zelda games.