I flew it indoors in a quick test... it needs some tuning, but seems to fly without trouble. I dropped it down from about 6' onto the floor. It was great, it just bounced when it hit.
Even though it looks a bit inelegant to some eyes, I think it might be a great trainer... the colors make it easy to keep visual orientation, you can see it in the evening, and it should take a crash as robustly as any frame can. I'll post an update and video when I get it into the air.