I know some people think that pre-booked transfers can be a waste of money, but I guess it depends how adventurous, or exhausted, you feel when you arrive at the airport.
We'd previously seen Rio Airport Transfer 'tipped' on this site and thought we'd give them a go as we'd never been to Rio and didn't know what to expect.
Although getting a yellow taxi from the airport doesn't look like it's too stressful, we're still happy that we booked our own private transfer as it meant we were whisked away to a nice car, with air-con, and didn't have to worry about speaking the language or being ripped off - which I'd heard happens often to tourists arriving at the airport.
We only got a one-way transfer to our hotel, and the hotel then organised a yellow taxi to collect us and take us back to the airport. The yellow cab was ok, but the car Rio Airport Transfer used was certainly nicer, and cooler, although of course we did pay a little more for the pleasure.
We were very happy with the service they provided.
Is this your business?