I dont personally know anyone that is running one but I have read a number of threads regarding problems with them. Additionally, you're relying on data from a less than ethical manufacturer when it comes to flow rates as I havent found any independent test results. To push the rated flow you're at 100% duty factor as well. I'm not saying it wont work, cant work, or will work. I just wouldnt trust the well being of the ENTIRE system to a single unit. It has nothing to do with the price and everything to do with the company that produces it (from a business practice alone). There are areas to try saving money and there are areas you'd be crazy to do so, I believe this to be one of those areas. You know what they say about opinions though...
If this pump wasnt directly responsible for exporting waste and importing clean water, heating (typically) said water, and promoting the vast majority of oxygen exchange within the system it would be story.