Ice cap or no ice cap? personal experiences?

If you've been given the option and are interested enough to give it a go, why not - you won't know if it's successful for you until you do it.  I did try it for the first couple of AC treatments but found that not only was I losing a fair bit of hair throughout but also that I ended up with a landing strip across the top from ear to ear (possibly caused by the cap not being firm enough against the scalp although the nurses were pretty thorough about that).  That's when I chose to stop as I found that more upsetting than being bald.  The cold cap does add considerable time onto each treatment but if you don't mind that, and keeping your hair if possible is important to you, there's no reason not to try it - you can always discontinue if it's too much.