How about the fees involved? Do you have a site where users can track the existing fees like with ethgasstation.info?
Transaction fees on the Harmony network are very low,
someone on twitter demonstrates transactions using the Harmony network.
Transfer ~ $ 5000 $ ONE
Tx Time = 2 seconds
TX Fee = 0.000025 $ ONE or $ 0.000003.
It seems that Harmony doesn't yet have a tracker site for transaction fees, but in the Harmony Explorer, the transaction fees are clearly displayed.