I own the 16 & 25mm Meike lenses. I really like them for my purpose, which is family videos. They're used on my GX85 & G85. They offer a nice sharp image through the aperture range. Though they may be a bit too clinical for some people's taste. I don't really look for a vintage image because I like digital images and I firmly believe in due time my images will look as vintage as they need to. I also like the weight they add to these smaller cameras.
I was a very early adopter of these lenses, so the 25mm version I have is the unabashed clone of the Veydra lens.The focus ring is a chore to turn by hand. I've read that the Veydras are heavily dampened.The 16mm version, which is the current design, has a far less dampened focus ring. I definitely prefer the 16mm focus ring as I don't use a follow focus, and assume the that a heavily dampened ring would be better suited for such a setup. I've never used a professional cine lens, so I'm truly talking out of my ass here. The focus throw is nice and long at around 300 degrees. As a side note I'm super pissed they changed the design, as my OCD strongly prefers they be a matching set.
I've never tested the markings on the lenses, but I wouldn't trust them for anything important. I would doubt the T stops are accurate from lens to lens. I would also doubt coatings match well lens to lens. I'm sure no one suspects the QC for these lenses is a very stringent process.
As far as I've read, in addition to the 12,16, and 25mm, they plan on releasing an 8, 35, 50, 70, and 85mm. Meike announced on Instagram this weekend the release of the 35mm in mid November. Their delivery dates change often though. I'm looking forward to the 35mm as it's my favorite focal length on MFT.
A bit disappointing though that the price from the 12mm and on will be $399 each in the US. For me that's enough of a jump to start looking at the SLR Magic Microprimes which come in faster flavors than the T2.2 of the Meike lenses.
Overall these lenses are fun for a guy like me to play in the world of cine lens make believe. MFT lenses are getting so fun now with the DZO zooms and the Vazen anamorphic lenses. It almost makes me not want to get a Sigma FP...but not really!