Fun, relaxing, and enjoyable if you like jigsaw puzzles. The tutorial is quick and makes it clear how to play. I love that you can use your own 360-degree images for custom puzzles, and the difficulty scales from super easy to very challenging, so the replayability is high and there's enough to do for quite a while. But if you don't like jigsaw puzzles, you won't like it for obvious reasons.
For fans of jigsaws? Absolutely worth the $2 price tag. I'm glad I bought it.