The build quality seemed really nice, but it's also not my flute, it was a friend in the flute choir. Tone and volume were great when I played it.
Also, I played on a Gemmy earlier this year for a few weeks until I got my DiZhao. It wasn't a bad flute at all, it was the solid silver model with plated keys. The headjoint seemed fine to me, and that's after playing an Altus.
Another friend, who borrowed the alto for a few weeks said she's definitely looking into getting one. She's an Ithaca graduate, plays on a Miyazawa. She loved playing it. I'll ask him again about it though, just to make sure!