Had no problems with OANDA except...
They have not gotten with the Metatrader program. If they are able to some how traslate their trading environment, flexibility of cost per Pip onto a MetaTrader Facility, they would in al likely hodd be the most used Broker.
The mark of a good broker is one who allow you to determine your own cost of trading and their proprietary platform does that.
Butt Metatrader and FAP, EA's etc are the future. A word to the wise...