Ceville is great looking, well voiced, thoughtfully done, and almost a classic.
The good:
1. Solid point-and-click adventuring with some fun, devious, but not too contrived puzzles.
2. Great characters and voice acting throughout.
3. Fantastic hand-drawn-looking 3d visuals -- everything is very detailed and colorful, and really well animated.
4. Good length -- I spent about 12 hours with it, taking my time and not looking up hints.
The not-so-good:
1. A lot of backtracking -- the game has many situations where you'll go back and forth between areas, but does provide double-click-to-run.
2. Some pixel-hunting -- There's still no great way to combat this... games that point everything on screen out seem too easy, but games like this are annoying when you didn't happen to notice the one tiny clickable area in a scene.
3. Humor can fall a little flat -- the humor is generally fine, but there are some long sections that feel a little flat and dull.
Overall, it's a very solid and ultimately fun adventure game for "old school" graphic adventure lovers.