Not coming here to bad mouh the Nexus but to clarify your mis information. Droid Razr Smart actions easily gets me to the 18 hrs mark on normal usage and well over 24 hrs on light usage. Also never had a random reboot, or needed an additional battery.By the way someone at Verizon told me that the "smart actions" on the RAZR were not helpful at all and in fact cost more energy than they save. It's a marketing tool for a battery you cannot extend or replace.
Please continue to send your ICS bug reports in so when us Razr guys gets its flawless.