The back was flimsy, the power button had a loose feeling to it. Top screen had a bit of LED bleed. Felt like a piece of crap to me.
Eh, too each their own. I'd mostly agree with your assessment (back panel and even the front plastic pieces don't feel super luxurious, but not cheap to me, and the power button feels a bit loose although mine doesn't feel cheap, just feels like its spongy) although I obviously don't think those are as big of issues (the backlight bleed on the 2nd display only sometimes is there for me which seems to indicate it has something to do with what it is trying to display) but in no way does it feel like a "piece of crap", and it feels more solid than pretty much every other phone I've handled recently (I'd say that maybe the new Samsungs feel more solid, but I still prefer how the V10 feels in hand, largely due to the steel sides). I've thought the iPhone 6 felt cheap when it came out and the 6S didn't feel much better to me. It might be more consistent but its far from a premium feeling device to me.