Boggo,
I've been trading with GO Markets MT4 for the last couple of days using their live platform, so far so good.
A few points, trade execution is as fast as IB, with all futures and FX you can trade a .10 contract position size, which for example the SPI can be traded @ $2.50 per point at a cost of .40cents each way.
I'm still learning how to drive the platform and have yet to use stops as I'm just scalping the SPI at the moment, also I'm looking to feed other charting programs with data using DDE which can be done I believe.
I'll report more later.