I really liked it in Madrid as it is an exciting city that has a lot to offer, from the never-ending nightlife to beautiful parks, museums and just the spanish way of living. However, you have to keep in mind that it's a big city with a lot of traffic, construction sites (more than in other cities and all year round), noise and air pollution.
In general buses are the cheapest way to travel around, only for short distances trains are sometimes a bit cheaper. A domestic low-cost airline is Vueling.
There are a lot of different supermarket chains. Among the cheapest are Lidl and Día, a rather expensive one but with a wide range of products is El Corte Inglés.
The best areas for going out at night are Malasaña, Huertas, Lavapiés, Arguelles and Plaza 2 de Mayo.
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