I went ahead and ordered the unit anyway. I should have it in hand by early next week and will let you know the quality then. I will probably be upgrading to the Koralia system at some point.
I don't think anybody on the planet has ever tried these.
There's a big sale at Hamilton Technology on these right now. Four pumps with controller for $119.00. It sounds too good to be true, which usually means it is too good to be true. I've never heard of these before today.