I've used one in a pilot. I think it had about a 1.25" hose on it. I used it for wasting sludge from a bioreactor that had about 1% sludge. It worked ok. Because I was using it intermittently and it had sludge sitting in it the inlet hose before the pump rotating thing would have to be cleaned out every couple weeks.
The hose pump part worked ok though, but keep in mind it was a pilot. I think you can get some more robust hoses that don't have to be replaced very often.