LectroFan - Fan Sound and White Noise Machine, White (FFP)

Is this better than the Marpac Dohm-DS Dual Speed Sound Conditioner? (it's currently the #1 best seller in sound machines on amazon). Why yes/Why no?

Anyone use a real fan first and then switched to this? Why did you switch ? I use 10" solder exhaust fan.

How is this any better than just hooking a speaker up to an iPod or phone and playing white noise audio files? Or just using an actual fan?

Can it run on batteries? If so, for how long? Also has anyone used it overseas?