It gets rather hot here in the summer, so I frown on putting a DVR unit in the windshield. I'd rather only have the camera up there and tuck the recorder unit away safely. Has anyone tried this BlueSkySea dual camera DVR? It says the cameras are 1080, but I'm just not sure I believe them for the price. https://www.amazon.com/Blueskysea-Motorcycle-Recording-Camera-Recorder/dp/B075FR7R3W/ref=sr_1_2?ie=UTF8&qid=1526234898&sr=8-2&keywords=motorcycle+dvr
BlackVue 750 has improved heat dissipation. I had it mounted for almost a year now - it survived last year's summer here in Texas, too
If you go the Blackvue route they have a mirror mount which gives you a very clean install. BlackVue mounting bracket for Tesla | Tesland.com
We just installed this yesterday and it looks great. Previously, I had a problem because the aftermarket sticky-pad that I used to install the BlackVue was getting too soft in the heat and my camera kept coming off the windshield. That won't be an issue anymore.