This was my first frame, purchased directly from jDrones and then lots of parts from CanadaDrones.
It's a decent frame as far as layout. With the 880kv motors it works well.
The fatal flaw is the motor mounts. For some reason it uses Plexiglas mounts that have been drilled - and they extend past the end of the arms. This means there's a shear line across several holes, and the Plexiglas is already less forgiving than most other materials.
While I've never bent an arm, I've broken literally dozens of motor mounts - usually the top plate. You can't buy the one piece separately, so it's $8.75 ever time you break a motor mount. The motor mounts are also finicky to put on, and crashes often lead to one of the threaded holes in the motor becoming stripped. I've broken motor mounts and NOT the prop.
Overall I'd say this frame is "fragile" - enough that I've stopped flying it altogether. The combination of Plexiglas and nylon standoffs means there's always something getting broken.