I've been running ICS 4.0.3 on a MID1126 for almost a month. I did a factory reset to bone stock 2.3.3 settings first, inserted a freshly formatted microSD card and proceeded to download and install the update to 4.0.3. I have almost everything running. I also installed the recent update to 4.0.3. Memory utilization is good (typ. 145 MB vs. 108 MB with 2.3.3) and storage use is better. Google Earth doesn't work but Google Maps does, a version of Android Market works, but not Play Store. Netflix 1.7 or 1.8 won't stream video on screen or thru the HDMI. MX Video player is choppy, so far. USB keyboards map better. I haven't gotten the tablet to recognize an external powered HD larger than 32 GB (yet, but ths works on my Acer A500 under 4.0.3) Overall, I'm pretty happy with the upgrade to 4.0.3.