I wanted to ask some questions too as I purchased this apparently nice little projector a week and a half ago, but some elements seem odd to me, especially after reading you all.
1 - As mentioned before, I feel like the light border is still quite present, even if not crazy visible from a distance. Mine is about 3cm long on each side (see photo - https://imgur.com/GNPlBEd
2 - The buzzing when the 4K is active is... intense. It's not present when I switch the "silence" mode ON, and I believe it is indeed the DLP / mirror thingy doing its work... but it's not silent. Using the very basic and surely not fully reliable "Sound Meter" App on my Android phone, it gives me 55db on top of the proj on average, 45db in listening position (where I sit to watch the movie). But it's more the nature of the noise which is a bit nerve wracking. I'm gonna go through the thread again, but does this feel "normal" to you?
3 - I haven't had many bugs, but one time I had the split screen bug mentioned in this topic. One half was dimmer than the other. It was suddenly, in the middle of a film. I switched sources on my amp and it was gone. Otherwise in 20H+ of usage this never happened. It was SHAFT on Netflix.
EDIT - I just played the Netflix trailer of "The Spy" which gave the same split-screen issue.
FYI it's a JULY 2019 unit, Firmware 1.0.2, Rev 02-103.
Otherwise, I'm pretty happy with the image which is indeed miles better than my 1070. For fun I plugged it again right after (although having a fairly new bulb) and I was struck by the difference. As Sage11x mentions, it is indeed hard to go back.
My 14 day return period expires on Monday so I'm trying to identify everything pretty quickly if I "need" to return the unit. Which would be a shame as I really enjoy it, although the noise is a bit annoying...
Thanks a lot for your opinion!