It worked great. Here's what I have found.
ICS is much faster, especially the browser.
I have no sound issues.
The camera viewer is messed up.
Sometimes the home screen is slow to respond when icons are touched.
HP's ePrint Home app does not work. It did work with HC.
Overall ICS is a big improvement over HC. I bought the A100 just to play with and because I liked the size and price. If Acer gets the official ICS ROM right, the A100 will become one of my favorite devices.
Sent from my A100 using xda premium