The city is considered an alpha+ world city—as listed by the GaWC's 2008 inventory[10]—and in 2014, Tokyo was ranked first in the "Best overall experience" category of TripAdvisor's World City Survey (the city also ranked first in the following categories: "Helpfulness of locals", "Nightlife", "Shopping", "Local public transportation" and "Cleanliness of streets").[11] In 2013, Tokyo was named the third most expensive city for expatriates, according to the Mercer consulting firm,[12] and the world's most expensive city, according to the Economist Intelligence Unit's cost-of-living survey.[13] In 2009 Tokyo was named the third Most Liveable City by the magazine Monocle.[14] The Michelin Guide has awarded Tokyo by far the most Michelin stars of any city in the world.[15][16]