I trade currency futures but mainly because I got my start in commodity futures and have slowly worked my way into currency and bond futures because of the instant fills compared to waiting for fills on grains, etc...
I pay $20 per trade (round trip -$14 plus exchange fees actually) and there's no fixed spread as in forex. Often the spread is 1 pip in currencies like the Euro. And I can trade 23 hours/day if I want to -the only break is between 5 and 6pm EST.
I trade from charts by fsxtra.com but now mainly use
MetaTrader for free through Windsor Direct as they provide futures data, not just forex. I like that futures are regulated so the difference between brokers is non-existent.
As for movement, I don't agree with the perception that there is a difference between futures and forex. The movements are nearly identical though the price levels are a bit off based on market perceptions of "future" currency values.
Slippage has not proven to be a problem though I don't place trades before major announcements and hope that a stop loss will hold to cut a bad call short.
I do like that futures are fixed, no debate about leverage or lot size. 1 pip in a Euro will always be $12.50 (unless the exchange changes the contract size of course) and a pip in the Pound will be $6.25 for example.
Bottom line, both have their pros and cons. Either way, the same skills need to be developed.
CT