I wasn't there very long but i went in october and its very nice as far as temperature goes. The people are busy but willing to help out if you need it. There is A LOT of sightseeing to do so you have to get a pamphlet when you arrive at the airport. There are taxies, car rental companies, busses, and airports as far as transportation goes and the city rarely sees smog. If going in the winter, bring a coat! Also, if you're a tourist, bring lotsa money cause there is stuff you'll want to buy. Keep in mind what you'll actually use though. Spending is an easy thing to do there.