Great camera especially for Video and Low Light shooting
Sony a7s MKii
I use the Sony A7s on the productions I work on all the time, I find it a brilliant cost effective second camera that can be easily matched the with Sony PXW-FS7's I work on a lot in the TV industry.
For the show Snackmasters I was DOP on for Channel 4 we used them mounted on Ronin-S's with Canon 11-24mm's on (your need a metabones with this as well) it gave a real stylised view to the small busy kitchens we were filming in and helped the energy of the kitchen really come across. As we was shooting with a gamma of S-log 3 in the edit they matched perfectly the viewer at home could not tell the difference.
This camera was also my first choice because of its excellent low light capabilities when The Gadget Show (Channel 5) contacted me about a night Golf shoot although not as easy to use as the Fs7 on a shoot as fast passed a Gadget ones because of its Mirrorless form factor but the low light pictures were amazing, be careful and run some tests before hand and set yourself a ISO limit, as if you go completely overboard with the ISO the picture of course does fall apart.