Snip from the EG review:
Whereas a traditional platform game could survive a sequence of poor levels, or even succeed in spite of a majority with a world as lovely as this, with characters so delightful and secrets so pleasing to uncover, Banjo-Kazooie: Nuts & Bolts is not a platform game. The game it has become instead demands thoughtful, exciting challenges that inspire the player to pitch in and help get the most out of each level, but it fails to provide them, and even though it's worth persevering with for the occasional hurdles race, egg-and-spoon and a game-world in aptly Rare form, ultimately it's a brilliant shell with a mostly hollow centre.
So there we are. Full thing through the link.