Should i be concerned about usb drop outs with my 2011 macbook pro?

i was thinkin about buying a midifighter 3d but im concerned about power issues. im worried that if i plugged it into a nonpowered usb hub along with my vci-100, with all those leds, could drop outs or freezes occur? the other available usb port would be used for my audio2dj soundcard and i'd rather not use a powered usb hub in this mobile setup. do you think this will be an issue? i'd appreciate any insight!

thanks!

It could happen, but why don't you want to use a powered usb hub? That's why they made them, so people can plug more devices into their computers without having to worry about power issues.