What an incredibly practical setup! Nice weight distribution of the two batteries on the Zemo and a thoughtful inclusion of a usable rack above the rear battery. I'm surprised that there aren't more commuter ebikes with a design like this. Golden Motor conversion kits offer a Y type harness to accommodate custom builds.
Look good yeh. Otherwise, heavy, heavy heavy. Less efficent. EXPENSIVE!! Oh and if it malfunctions, no LBS is gonna work on it. You're shipping the wheel back to the maker for service.