Excellent major roads, well signposted and maintained, with a few badly potholed exceptions. We didn't really use any secondary roads. Lots of police and military presence on the roads, friendly and polite, mainly waved us through.  Toll roads abound, and are expensive - we passed through more than 30 toll plazas, averaging $4.

Not as spectacular as Bolivia, but perhaps the most widely beautiful scenery in South America - very few areas were bland or dull.

Still fairly expensive, but no evidence of discriminatory pricing. In general, the most friendly and helpful people in South America in our experience - and all the travellers we met in the country said much the same thing.

Sad that people are so scared to visit Colombia - propaganda is an amazingly effective tool. Not that Colombia doesn't have real problems - guerrillas and drug cartels - but the main problems are now restricted to certain parts of the country, and the government has  it largely under control. As long as one sticks to sensible travel practices it's probably safer in many ways than most of the other countries we have travelled in.