This week ive started doing squats free bar, without any neck pad. I can squat more, go deeper, and keep my back straighter without the pad. Suggest to anyone to make the leap and ditch the pad.
I used one when I just started squatting, but I quickly got rid of it. It ends up making the bar more unstable, and actually made my neck hurt worse than squatting without one.
I've recently started using pads, because I was getting some pretty god awful calluses on my traps from the bar. They felt like scales. So now I use my workout towel as a pad, which works well. It isn't so harsh on my skin, and it still provides decent friction to keep the bar stable.
Pad? I think I've seen a couple little girls at my gym use one before. LOL... If it hurts without it try holding the bar further down on your rear delts...