Firstly, I must warn the people that will not like this game, because there will be many of you.
1. Fanboys - no, this is nothing like the original, except the fact that the vehicles replace banjo and kazooie's attacks, so really it is the same but you will ignore that fact
2. People without imagination, you will blitz this game very quickly to completion, but if don't have imagination, all you will get is acheivements and no fun.
WOW! I am a hardcore CoD fan. When not playing CoD I pretty much only play SvR or Oblivion. But this game has worked its way into the fun. Why? It is just so much fun, you can create anything you want, and thats what is so fun about it.
You can easily create a vehicle for all land, sea and air missions, but its far more fun creating somethine wacky that will do it in style, but more so do it in a crazy way.
Some people say that this game could have been made for any chataters, true, but the world of Banjo Kazooie is what gives this game its charm, imagine sonic building a sea-plane-car that fires... Rings? No, Banjo and his many fan favourite baddies are what make this game so fun, and give it long term playability.
Want some ideas? You can build most vehicles from halo, the deathstar, a tie fighter or x-wing, the massive at-at, you can even build the normandy from Mass Effect.
You can spend hours just building silly things and messing around in the test track, before bulidning that drag-sledge, or drag bike, or submarine to take into the beautifully designed worlds and complete the missions.
Thats not even to mention how much fun you will have doing the missions. The first world will have you race through checkpoints, play football and even be a bouncer for Clanker. So many different types of missions requireing so many different vehicles- the possibilities are endless.
All in all, buy this game, and let your creative juices flow.