The arms are horrible what moron decided this was a good place to inject? obviously a man.... and obviously a neuro. I decided Sunday instead of doing my other arm ( I try to keep my rotations on the same day of the week) anyways, I skipped the arm and went straight in the tush. Aside from the usual bee sting effect afterwards, it seemed to do pretty well. I think it's because I have so much fat back there. Changing the angle sounds reasonable. I do the autoject so my angle really doesn't change. Not brave enough to do a manual injection yet.