The first ZMR250 Chinese all-carbon mini-quadcopter seemed a reasonably good product but this new one is very, very poor.
Not only is the milling of the holes and slots atrocious but the carbon plates that make up the frame were badly warped - resulting in a decidedly "out of square" quadcopter.
I manged to get it straight by twisting the frame against the warp whilst tightening the bolts but I'm pretty sure that this will not be a permanent fix.
Perhaps the demand for these frames is now so high that any thought of quality control has gone out the window in the name of simply shipping as much product as possible -- regardless of the faults, flaws or just down right crappy quality.
So I guess now, more than ever, buyers need to weigh up for themselves whether the certainty of quality associated with buying a "name brand" is worth the extra money.