As there doesn't seem to be an owners thread so far, I thought I'd start one. My setup: AV: Sony STR-DN1080 Speakers: 5.1.2 - Dali Zensor 3 left and right, Dali Vokal Centre, Dali E-12F sub, Wharfedale Diamond 220 as satellites. Sources: a Swiss UHD internet tv box (Sunrise UHD TV) with Netflix, and a HTPC, i5 4570, 8GB ram, with a GT 1030 graphic card and a Samsung 840 Evo system drive. I have a dedicated room, 4m x 7.5m, with a 130" Black Widow screen. The projector is ceiling mounted. The Acer is replacing my Optoma HD300x which had a bad bulb explosion. Settings: Super Resolution: 2 Brightness: 50 Contrast: 30 Sharpness: 7 Brilliant Color: Off DynamicBlack: Off (see below) AccuMotion: 1 when necessary (if you don't like the video look, leave it at 0, but if you're getting judder move to 1) SDR Mode: Standard (according to the 2 reviews on french sites, this gives the most accurate out-of-the-box colour) SDR Gamma: 2.2.B.E.2 HDR Mode: HDR 4 HDR Gamma: Recommended is 1.8 or 2.0 but I generally stay with 2.2.B.E.2 HDMI range: Limited for SDR, Full for HDR Bulb mode: normal (non-Eco) Note: It's been remarked elsewhere that the projector doesn't correctly detect HDR from all sources, but that you can get it by forcing your source to 4:4:4. That's only going to work, though, on 4k 24/25/30 material, as 4k 50/60 are beyond the bandwidth capabilities of HDMI 2.0b. The machine only has one memory position, which is absurd given that you're likely to need different settings for SDR and HDR, and possible more for juddering material where you need to activate AccuMotion. The machine is certified ISFcc, with 2 ISF memory modes, but they are only accessible via a code that's given to calibration professionals. Given the low cost of this machine, I doubt many people are going to hire a professional calibrator. In the french review, this machine was considered better than the 2 more expensive Acers on which it is based - the H7850 and V7850, and also better than the Optoma UHD550x, UHD60 and UHD65. I've never seen those machines in the flesh so cannot comment. One of the reasons I bought this machine is that everywhere I read it said it had both negative and positive lens-shift of 15%. This is false. From my estimates it has a total of 15% leeway, but it works out at best at about +/-7.5%, maybe even +10% and -5%. The position flexibility was a factor in my purchasing it and I had a hard time installing. In the end, I've got a very slight trapezoidal effect (not enough to affect focus at the top or bottom of the screen) and as there is no keystone correction I've just got to live with that. The brightness of this machine is amazing, as it the sharpness of the image. I cannot detect any chromatic aberration, focus is constant across the screen, even with slight trapezoidal effect, color is rich and deep. According to the reviews, like the other TI based 0.67 machines, will it can hit Rec.709, it can't do much in P3. I've pixel peeped at different UHD test pictures, including the infamous quick brown fox, and compared what I see to the same images on the 4k Samsung UE43KS7580 which I use as my monitor for photo and video editing, and have a hard time seeing any difference. On 4k video material I'm very happy. Upscaling seems to be automatic, and there is nothing in the menu to control it. I sent my first machine back as there was a whining noise from the XPR unit. I was able to replace it in 24 hours and the new machine is extremely quiet, even without going into Eco bulb mode. As reported in various forums, the Acer is difficult to master, but once you master it the results are fantastic. The first problem is handshake issues. I went through 3 different certified premium cables before finding one that can consistently handshake with the projector, and doesn't have drop-outs or artifacts. I also had to reorganize my setup to allow me to go with a 5m cable instead of a 7.5m one. There are quite a few quirks. First, getting into HDR mode is sometimes difficult. I can consistently manage it from my HTPC which nos has a GT 1030 card, by selecting windows controlled SDR mode, rather than Nvidia 4:2:2 10 bit, and viewing HDR content with MPC-BE using madvr and Lav filters. Other sources are more problematic as you really need to switch from an 8 bit RGB/4:4:4 mode to HDR for the projector to recognize HDR content. This issue has been reported by many people. One could hope for a firmware upgrade to fix it, but Acer aren't noted for doing such upgrades. Once you do manage to get into HDR mode, however, the results are tremendous. This really is where the machine shines. Matched to an Oppo or even an Xbox One S, UHD HDR content is outstanding. My HT is a dedicated bat cave, with 0.9 gain 130" screen, so this is a really good environment for this projector. Now, let's touch a weak spot of the projector - Dynamic Black. All the XPR DLPs suffer in black floor. Generally, they try to improve blacks by various modulations. On the M550 it's called Dynamic Black. While it certainly improves blacks immensely, I've noticed that it produces artifacts at the white end that are just not acceptable. Violet-blue solarized centre spots in the middle of an area that should be white that sparkle! This disappears immediately if you deactivate Dynamic Black. Here's an image with Dynamic Black activated: The blue blobs in the top of the image move and change form all the time, even on a frozen image. And the same without: You can clearly see the detail of branches in the shadows that are not present in the first image, and the absence of those horrid blue blobs. The problem is with blues, and the following colour swaths show: With DB: Without DB: The solarization ramps in the 2nd image aren't actually noticeable to the naked eye as much as they seem to be here. So, I've ended up disabling DB, but then I have to use normal bulb mode or my blacks are too grey. Compromises, compromises! In short, this is a great projector at a low price for a dedicated room. I wouldn't want to use it in a room with ambient light, however. I've not tested other Coretronic XPR machines like the Optoma UHD65/60/500x but the French reviewers who have rate this machine as better.