Also, from what I hear the SP dynamos are pretty efficient and reliable and almost the same price as the Sunup Eco (though you'll need a couple of spokes + labour for a wheel rebuild).
You can buy a Shimano DH-3N80 for less than the Sunup Eco and it weighs less than half of the Sunup Eco + regular hub combo. The N80 gives you Ultegra-grade bearings.
I see nothing really that speaks in favour of the Sunup Eco.