Hollyland sent me a Mars M1 Monitor to review.
I've been using it for the last two months and here are my thoughts and test results.

0:00 Introduction
0:20 PROS
0:25 Value (included accessories)
0:45 Versatility (monitor/transmitter/receiver)
2:23 Image Quality
3:35 Build Quality
3:53 UI Goodness
4:16 DC Barrel In and Regulated Out!
4:38 Pairing speed (with studio BTS)
5:58 CONS
6:03 Viewing latency (even as on-camera monitor!)
6:40 Start up speed
7:05 UI Badness (lack of tool customisation)
8:07 Noisy Fan
8:50 Power Consumption (compared to others!)
9:17 Battery Life
9:45 I wish we had a 7" and 15"/20" version
10:30 Range "testing"
11:13 LATENCY TESTING
13:21 Why I prefer hardware receiver over iPhone/iPad app (inc Monitor+ app)
15:12 Conclusion
15:48 ... or the shinobi?
16:15 ... or smallHD
16:44 ... nah, it's awesome!


MONITORS (not affiliate links):

Hollyland Mars M1:
https://amzn.to/3q6kh9E

Atomos Shinobi (thanks Daniel!):
https://www.bhphotovideo.com/c/produc...

SmallHD 702 Touch:
https://www.bhphotovideo.com/c/produc...

SmallHD Focus 7 (no longer available, replaced by 'indie' line):
https://www.bhphotovideo.com/c/produc...

Atomos Shogun Inferno (thanks Charles!)
https://www.bhphotovideo.com/c/produc...