You are so right....everyone has different flight agendas, some fly for 10 min. at a time...some all day and can't get enough. The latter would be the true test. However, though I refuse to purchase an engine like this soley because of my suspicions it's not worthy, I will reserve my judgement until one of the major rc magazines run a test on it to determine worthiness. Those guys are very critical and the beens would be spilled if any flaws show up. Probably would not be fair to compare a $200 engine to a $600 one, but many of us would like to know how it does on it's own....even without comparing.
I wonder if such a test will come....