I think it's amazing.

Played with it at work for a while.

You will find that due to google being the developers, and being yanks, they have highly concentrated on the USA, and major cities in the UK. As for rest of world, the quality is a bit more poor.

I managed to see whales in Sea World Orlando Florida, aswell as the Hollywood sign in the hills of L.A.

You can see all around Disney, the boats on the lakes, the rides and even the Castle

Very well developed piece of software in my opinion