I have been trading a mini fx acc with GFT
for a few months now and i can say the following :
Their web based platform crashes frequently (especially around report time)
and fills are slow ; fill quality is decent.
Their windows based platform (dealbook)
is more stable but not user friendly.
Also their accounting is based on the UK
standard which is more complicated than
the US.
In summary i still believe that best platform is being offered by OANDA , on all counts. Otherwise trade CME currency futures