Sorry to hear of your bad experience d8ve,
Regarding the wheel being in upside down I was not aware of that, but this one has a rubber cover for the nut so I thought it would be ok. I've had it for a while and the frame has held up so far it's aluminium and pretty strong so not worried about the extract arm.
Regarding safety I maintain the bike regularly so that's not an issue, and I think it safer to ride on the road at these speeds so never go on cycle paths, this is purely for faster commuting, I have other normal bikes for fun riding