Wanted to update on this. I returned my 7" last month (Sept 3rd) after it failed to display any signal. Don't know what happened, one minute it was working, then next minute... nothing but blue screen. I've only used it on 2 projects (music video with bmpc4k and fashion one with my 5d3).
I tried hooking it up to my 5D3, BMPCC and BMPC4k, but it failed to display anything. I tried setting the monitor to factory default, but to no avail. Even tried a 2nd HDMI wire for 5D3 and BMPC4k.
I didn't do anything out of the ordinary and always babied the monitor. MustHD was gracious enough to offer a refund, but the pain of shipping overseas -- it's been over a month now and according to USPS tracking, it's still shows as not delivered. USPS attempted a delivery on Sept 12, but wasn't deliverable. I contacted MustHD and gave them the tracking#. Still waiting on this.
On another note, I've since bought SmallHD DP4 and is extremely satisfied with it.