Just recently closed my MB accounts, after about 2 years. I did not trade FX there, only stocks and futures. From my trading standpoint, the lack of a DOM ladder was a major drawback. Compared to platforms using DOM order entry, Navigator is slow and clunky. That is not to be confused with order execution. Personally, I had no issues with fills... I'm referring to the mechanics of placing orders.
But the decision to transfer out came about due to MB's recent arrangement with 4xMadeEasy. I have first-hand experience w/users of that ware. My cousin spent(wasted) 4K on 4xMadeEasy against my advise, and so did one of his friends. I even attended one of the training seminars with my cousin, not the initial pitch but actual training... green = buy, red = sell, and always use a stop.
To be blunt, the vast majority of people that purchase 4xMadeEasy don't know how to spell "FX". IMO, this will cause a big strain on MB's staff. Not to mention servers. And I'm not too sure the "image" of being associated with 4xMadeEasy will be well received by professional or otherwise knowledgeable, experienced traders. That's important because high-volume traders are either daily gravy or daily bread-n-butter. I don't know which in MB's case.
Bottomline, IMO, MB seems to be executing on a new growth strategy. And while I don't have anything against MB (except lack of a DOM ladder in their software)... for now, I'll watch.
Osorico