It REALLY depends whether you should get this or not. Personally, I'm very happy. Despite the issues this monitor has, I love it . I love 4K, and I love a LARGE display. Below 30 inches would suck to me personally, but you could do it. I rarely get the screen flickers though, and never has it been during gaming. I am not a serious enough gamer though that if it ever did somehow miraculously happen during a game causing me to die that I'd care too much.
The biggest reason I got this monitor is that 4K 144hz monitors are coming soon, and I don't see much of a point in sinking too much money into anything when that's coming. So I'd rather buy this monitor, and even a cheap high refresh monitor than buy an expensive monitor and then upgrade again at 4k 144hz.
4k 144hz I expect to be truly available by 2018, so I see monitors now as a stop gap solution.