Mine's a black-shell, so the eye problem isn't an issue for me. I did have the motor burn out on the 2nd day I was using it, however - it seems like a lot of people had the same problem, and as far as I can tell there was a bad batch of motors in halos produced around the beginning of the year (just after they'd restarted production after the whole BE debacle.)
Once the motor was replaced, it's run like a dream ever since, and I've broken 1 ball out of about 8 cases of paint I've shot through it since then
So yes, there have been reliability issues, but it's the price you pay for the only loader that can keep up with the current generation of electronic markers.