My station (and others in my station group) have been using this for a few months... We've found it to be an invaluable tool... When a sat or microwave shot is having issues or not possible, it's proved to be a reliable way to get video back to the station, and at broadcast quality.
Of course, feeding back by microwave/sat is still faster, but Latakoo has been a great backup, and faster than FTP in many cases (especially when transferring HD video). Our chief engineer told me when we started testing it that they charge per minute, not by file size... so a 1:30 PKG fed back by Latakoo costs the same whether it's SD or HD.