Rio 20 feedback

[Floop70]

Is there anyone using a Rio 20 pump who could provide me with some feedback from their experiences? Reviews on the net appear to be fairly good from what I can find. I'm about to buy a used 90 gallon that comes with this pump and would like to know what people think of it.

Here's a link to the Rio 20 HF, although I'm not sure if the HF designates a different pump altogether...

Thanks,
Bruce