The headbutts down low are borderline painful. It feels like I'm being headbutted or poked in a raw spot. It's hard to explain since I can't come up with the words for it.
I got a couple kicks up higher at the belly button though. One really big one just about 10 minutes ago (it's 7:23 now). That one felt really cool and not painful/raw at all.
I think I felt baby roll a few days ago though. I can't remember what that felt like, but it was pretty cool.