I had reservations about the ZMR250 miniquad when I reviewed it and I have to say that after flying it hard for several months, I'm still not in love with this machine.
I've been through several arms which have failed in relatively unspectacular crashes and now the spacers are stripping out because the screws are too short.
Yes, it is a great-priced frame and yes, it does fly okay -- but to be brutally honest, it is my least-favorite miniquad and the one which takes most work to keep in the air. In fact, it's the only one which has suffered any major structural failures at all.
Okay ZMR250 fans, let me have it with both barrels :-)