You really should get some RON from the cash machine (there are multiple) at the airport. You could end up with a silly rate if you don't. Currency exchange booth at OTP does not offer a decent rate so it's better to use the ATM.

There is a taxi ordering system in operation at OTP.

Taxi rates generally vary from 1.39 - 3.50 lei / km. 3.50 lei ones only tend to make an appearance around the airports and other potential visitor traps. Sub-2.00 lei ones are far more common although at airports 3.50 lei ones tend to be rather common. You really shouldn't pick the taxi that charges 3.50 Lei/km though (this is the rate the OTP ones at the rank all charged until some time ago but it's changed now and you can get the cheaper ones through the taxi ordering system). The rates are displayed on the side of the taxi and not difficult to spot.

Make sure the metre is turned on as soon as you get moving - not turning the metre on and charging you more than it should be is one of the potential pitfalls of taxi rides there. Besides that, the most common trick is the usual "driving around the houses to rack up the fare", although you won't come across it often at all if you are using one of the better taxi firms. It's the independent one that you need to watch out for. That being said, rip-off taxis are not altogether so common in Bucharest nowadays, no more than say in Italy. Speaking bits of Romanian also usually stops them from taking the mick. Despite all that, because the taxi rates are rather low in any case, even after driving right around the houses it shouldn't come to any more than £15-20 in any case.

Do not get persuaded by the taxi touts (they have tried to clear them but there are still some around) in the arrivals area. Their fares are generally outrageous. I sometimes get them to tell me the rate out of curiosity and I have had anything up to €150! It normally costs less than £10 equivalent to the city centre.

Expect some bad driving from some of the taxi drivers, but not as bad as IST usually - I have not had one reverse down a dual carriageway in Bucharest yet despite a rather frequent use.

If you use the taxi ordering system from OTP, keep the ticket in case you want to make a complaint. Don't give it to the driver.

If you want to read about Bucharest taxis and other modes of transport, I recommend you read http://beta.inyourpocket.com/buchare...blic-Transport
It's written by a long-term resident of Bucharest and is a good source of information.

(I have no association with IYP guides other than having been a reader for various cities.)

I should probably provide one word of warning. Watch out for feral dogs. Some are not in a good mood and may snap at you.