Hi Jay
I live in the Spanish East Mediterranean coast surrounded by rice paddies and it is an invasive plant causing serious problems... So yes, it grows very very fast. I have used it as a floater but as it happens with other small floaters (Lens genus for example) plants easily turn in the tank like if it was a washing machine (at least with my flow) and dead individual plants and roots clog the filter intake, this is why I got rid of them. However, instead of using them to cover all your tank surface, which is a nightmare, it can be nice to have a few of them but IMO always in low numbers together with other floaters, such as Limnobium or Phyllanthus.
Jordi