Been using my M70-E3 display for about a week and I'm pretty happy! I'm coming from an older Samsung Plasma, so I'm used to "darker" picture.
Impressions - Rtings calibration settings vs the default are similar to the naked eye. There isn't much difference from my perspective, but that's okay. Colors are super vibrant and blacks are inky black. This may be why darker scenes look dark because of how inky these blacks look. I don't mind this.
HDR/4K - HDR/4K looks just as good as it does in store. There's not a lot of content, but from the "demo" 4k content on YouTube, I'm very impressed. Also, HDMI 1 properly brings in 4K and HDR from NETFLIX accurately, which is great - I'm casting directly to the display with using the built-in Chromecast. Oh, and ARC is fully supported with my Sony DN1080 receiver.
I am one of those who couldn't decide if I liked the soap opera effect, fortunately from this display, it's not an option. But 4K 60fps looks GREAT - I have to admit I used YouTube 60fps, so it may not be true/real. But looks great to me.
Overall, pretty happy with the display and color quality. Glare isn't too bad and the viewing angle on the M70 is actually better than expected. Dark scenes are a little dark at the moment (when viewing in the middle of the day), but I'm thinking that will be addressed over time as I continue to update settings.
Hope this helps someone who is on the fence.