I bought the Sony and it looks like (for me) it'll be a "keeper".
The brightness looks to be about 50lm-70lm not only to my eye's rough guess, but also when compares side-by-side the ~150lm p300. With the Sony close enough to fill an image about 1/3 as large as the p300 the Sony looks as bright or brighter with both scenes and test-patterns..so I'd vote the ~60lumen thing as legit.
The blacks are amazing and even the higher APL contrast is pretty solid. It was weird for me to want/need to turn PC gamma darker for once because it smoothes the transition to deep-space black with lower quality sources.
Even with the projector up close and making a 4inch-wide image the black-level stays basically invisible..even with some dark content in the scene!
The glitch with low APL color is still there to some degree. I don't see it much/at all with Netflix, but I definitely notice it during part of a scene in DarkKnightRises. It seems to be a product of the surrounding colors..in a dark scene with certain gradually skin-tones, when certain other tones are present within a close enough proximity the fine graduation in some of the tones becomes rougher because a few of them get altered.
It's selective enough for me right now in combination with the price and other factors to the point where I'm able to accept it, but I can certainly imagine others not being interested in such a gamble or compromise.
THIS and to a much smaller extent, the low brightness, is what I would call the only real thing standing in the way of this being a ridiculously excellent projector for a treated/dedicated room.
There is also the portable aspect and its various shortcomings. The lack of a tripod mount is likely to save size and can be easily overcome with a clip-on tripod or simply a couple rubberbands or hair-ties.
The keystone is sadly the standard digital correction and NOT a repositioning of how the mirror/lasers shape the image. On the plus side the amazing blacks and smooth pixel-structure hides two of the normal downfalls of digital keystone, though you're still left with a lower brightness and less overall resolution.
The main downfall to portability in my spoiled opinion is the inability to play video from a USBflashdrive or SDcard inserted into the Sony..they sadly opted to build a "portable" without any built-in media player.
There IS an air-port on the bottom which seems to not give me trouble despite my tripod blocking it (they are supposed to be left open, of course)..also, they are passive ports because there aren't any fans and the only noise from the device is a very quiet whine from the mirror..not piercing super-sonic, just a simple high-pitch that is apparently quiet enough for me to have the projector practically over my head while watching.
The wireless must only work with miracast as advertised because the built-in wifi-direct and dlna of my Samsung tablet (which plays flawlessly with my wireless LG projector) doesn't work with the Sony..they see each other, but time out. A limitation, but an advertised limit.
Its only other input is a single hdmi which doesn't play particularly well with my cable extender/s which I have to assume means it's less beefy than my other two portable PJs, though this makes it more the norm than the exception since many projectors aren't friendly with silly cable extenders or other adaptors..I've just been spoiled a bit by the p300 and pa75u.
The image is softer than my other ~720p models (both DLPs) to the point that a 1080p desktop isn't really readable anymore and the tiniest font on the 720p desktop is a little hazy.
I am very happy to report that there aren't pixel-gaps during larger images and I don't notice a sudden loss of readability with fairly tiny images.
I was initially worried that I was seeing horizontal pixel-spaces during a quick test, but later realized that focusing while the image is tiny and bright makes (at least in my case) the eyes more apt to see the scan-lines to some degree. However, this seems to become much harder with a larger image or while watching from a less crazy-close distance from the screen..especially once you're simply relaxing and watching.
Basically, if you walk up to the screen a bit and try to focus on seeing the lines there's a chance you'll actually see them for a while, but it's otherwise a non-issue during regular viewing (in my opinion)..then the image is nice and smooth.
I also don't see any sparkling on my matte-white screen, even with large areas of solid color.
However, it looks like all of my gain-boosted screens suffer varying degrees of laser speckle and I'm doubting a 1.3+gain screen would be a viable solution for the lack of lumens here.
I didn't notice lagging while moving the PC curser around the screen, but didn't otherwise test it.
Outside of the above-mentioned specific dark-scenes color anomaly, colors are nicely subtle and all the omtrast/saturation/tint controls are fine out of the box. The white-balance appears a bit cold to me but not awful. The greyscale has a couple somewhat fast/long jumps in the dark end which are helped by slightly darkening the gamma from the player if possible, but at least there isn't any inherent clipping outside of the anomaly.
Because of the anomaly, I wouldn't recommend this for Black&White materials as they are likely to suffer some color fringing or tinting during enough scenes to likely put-off most viewers.
Okay, that was kinda all over the place. If you made it through, you're a trooper.
If you have questions, I can try to have answers.
I currently am enjoying the MPCL1 on a 92" ~1.0gain white screen in a dark, black-fabric-treated room, connected to a PC with a short hdmi and a simple 2.1sound-system connected from the Sony's 1/8" aux-out.
Besides the occasional color anomaly in certain lowAPL scenes, I'm VERY pleased.