We just received the Movi M5 and wanted to test it at in a wedding environment. It turned out to be quite a helpful tool for both creative and documentary shots.
Here is a short review of my personal experience working with the Movi M5 at a wedding.
We used it with Canon 5DMK2 and a 16-35mm f2.8 lens and Small HD LP6 monitor.
All shots in the review are raw, unbalanced and ungraded.

Check out more of our work on our website iqvideography.com
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Full highlights movie here: vimeo.com/93524444

Also, a few notes:

Looking at the small camera display is hard enough, but at certain angles it's almost impossible. You will need an external monitor.
Tip: the Mōvi is pretty sensitive to any change of balance and traction, so you will need a very thin HDMI cable. I found this extremely thin and flexible HDMI cable here: hypershop.com/HyperThin/Worlds-Thinnest-Most-Compact-Flexible-HDMI-Cable/HTM08-BLACK.html

I had a total of 4 batteries but used only one (2 are included with the Movi M5). I tried not to overuse the movi, just like i would not overuse any other stabilizer... but i guess if you plan to have a dedicated Movi operator for the entire wedding, you'll need more batteries.

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