I always wanted to try it but I feel that its kinda strict like it must be done in the morning, open air, certain direction. I feel that someone w/ a busy schedule may not have the luxury of doing any of that! Plus it you'd end up looking weird if you do it openly as well!
I don't know how chi feels like but I somehow can make myself get goose bumps on the fly lol! Its an electric feel to it that start from the upper back the spreads to the front almost like cold water splashing! Cause from what I hear about chi is that it is warm lol!