I've not used an ingenuitea, but I have used a similar device from Kamjove to brew tea. I mostly use it for bulk brewing, but I can do some gongfu cha if I am more careful with it. The Kamjove that I have is designed such that there is a minimum amount of water that sits below the filter that contains the leaf, a 'dead space' that cannot be packed with leaf, so I cannot do very small volume sessions with it. The ingenuitea looks better for this, because the 'dead space' appears to be smaller.
So....go ahead and have fun!