I am very experienced Jum'N'Run players started has this with NES and Sega Genesis; it is still one of my favorite genres.
However, I am not a big friend of 3D platformers, Mario 64, Ratchet & Clank and a few others are the only ones who have convinced me there.
Galaxy is again one that has a lot of fun to me, but also almost covered childish comes across (Bee Mario was I even almost embarrassing).
The difficulty was mostly very pleasant. Both points draw since Yoshi's Story mercilessly by and let the game almost seem like a parody of itself.
But honestly, through gambled because it is fun, you have it anyway ... right? ;)
For this, the level design is absolutely first class, the graphics also very consistent, the songs are mostly good.
The part "confusing" camera views are sometimes enforced, otherwise the planet would feel not quite work out, so I feel at least.
To get all the stars and then again to play through the game with Luigi however is not so simple, given how it might be expected or plugged here. The main game itself, however, might even get by a novice.
Overall a very good title, the main game is but almost too easy.