Multi input + overclock? Suspicious. Very, very few of the multi input monitors have been shown to overclock. And even those were limited to 85hz. It is far more likely that this one does not in fact overclock, and skips frames when a signal>60hz is fed to it.
As for the tempest - it works. It's the "k" series of monitors. We don't complain about Intel not guaranteeing 7.2ghz overclocks, why should we be so skeptical about a much smaller company not guaranteeing 120hz overclocks? Especially if the monitor is *cheaper* than many other competing 1440p monitors. It overclocks. If there has been no user reviews, true, skepticism is the order of the day (such as the monitor above). But there are dozens of user reviews and they are generally positive.
What you should be concerned about -
It overclocks, but you might not get all the way to 120hz. It isn't unusual to get 120hz.
Motion blur of reduced, but only by up to half, strobe lights are still better.