I recently upgraded my HTC Sensation to Android 4.0.3, aka Ice Cream Sandwich. The one major annoyance I have is that, often it would take several seconds for the display to wake up, after pressing the power button. I’ve never had this issue with the original firmware. I also noticed that the clock is displayed using a different font. Didn’t like it at first, but have gotten used to it now.
Other than that, I’m loving the HTC Sense 3.6. The task list and the data usage monitors are something I’ve always wanted. The Internet browser still leaves plenty to be desired; but that’s easily fixed by installing ICS Browser+ by Beansoft. There are plenty other UI changes, but nothing that particularly wows me. Overall, I’m pretty happy with the upgrade.