GUWonder, yes, you are right... the taxis are incredibly inexpensive. And that does make it easier to get around than driving. Also they know where they're going, so unless you're very familiar with the city, it's just one less responsibility by taking a cab.

But one thing my husband and I like to do is just drive and look. So, for example, if we were going to go to an estancia, it would be fun to drive out on our own... stopping where we saw fit, and finding little gems of experiences.

But the balance so far is still tipped toward using taxis, I would guess.
Rita