Mine hasn't been an issue at all. I have that version and also, there is one with a button that latches on it. Both of them have held the device securely. Actually, surprisingly good over time.
I use my flip up at least once a day, and I got those cases right after I got my note 2 (like middle of November). I couldn't stand holding my first one all the time to watch videos, si that was number one on my list of accessories, and it hasn't disappointed. There is also the bear action cases that while they work great, they don't look as polished to me as the spigen. But they are durable and protective also.
And the cases actually dorm a groove that the phone/case portion sits in. I am trying to think, but mine has never come out on its own. The weight of the device is shifted, so that it actually wants to sit in the groove. It's extremely safe. And I'm not sure what adhesive they use, as it's clean and you can't see it. But I'm thinking an epoxy because when I first got it, I tried to gorilla it apart and it wouldn't budge, still doesn't. But it's sturdy for sure!
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