Microspikes are really nice. They'll grip on a sheet of complete ice coverage. I've used them for hiking efforts though not for photography. They are not made for walking on uncovered concrete though. I can't imagine it is good for the spikes and it also hurts your foot because of the pressure points.

Dave,

I'm sorry to hear about your lens, but this is a good reason to use the hood. It may have prevented lens damage in this case.

Dave