I have been there some years ago.
It was a short trip but I stayed on Bogota most of the time.
Good nightlife, pretty girls, average prices, good landscapes.
Interesting places to visit, example: Gold Museum (Museo del Oro), if you're into religion and got some time pay a visit to Salt Cathedral of Zipaquirá it's close to Bogotá.
http://en.wikipedia.org/wiki/Salt_Cathedral_of_Zipaquirá
Usually safe, just don't go wandering everywhere in the country.