[Motorola Droid RAZR] R3dbeaver:
alright, played with it the whole long weekend:

- home screen sometimes crashed. this happens sometimes when i unlock the screen or going back to home from an application by either using the back button or home button. half the time it crashed i need to reboot the device. most of the crash the screen just freeze. not happy.

- battery is a little worse? with 2.3.6 i can sometimes (rarely) get away with not charging every day. now it can be 100% in the morning and with a little camera action and browsing and map, it's 10% by 9PM.

- pattern unlock and face unlock is very laggy. but this could be related to the weird homescreen crashes mentioned above.

- some widgets doesn't work, but that's to be expected. just be careful when u upgrade without wiping, ur phone can lag SO bad due to widgets trying to load. especially those switches. wiping everything out is recommended.

- My Gallery camera roll is laggy in terms of showing the thumbnails. GB used to load all thumb pictures as soon as i scroll them, ICS is taking its sweet time. i thought it's a caching issue, so i go to homescreen, and go back in, and it loads (with lag) all over again.

- root can be a bit of an issue as i mentioned in my previous post.

- camera apps (default and CameraZoomFX) takes a bit longer to load. from home/app screen or from gallery.

- com.motorola.friendfeed is a killer. i used to ignore this in GB when watchdog occasionally flag this as cpu intensive, but now its consistently uses over 20% CPU even if i haven't touched My Gallery or use any social apps. And disabling "see friend's pic" in My Gallery doesn't help. i had to use TiBackup to freeze it. that helps with my battery a bit.

- some widgets (as mentioned) doesn't work. i use Powerful Switchman and the Data, GPS, Screen Brightness is very flakey. Too bad ICS doesn't have the switches in Notification bar like some ROM.

Ok, enough gloom and whine... here's the plus points (that i can think of now. there are definitely more)

+ way more fluid UI. i definitely CANT WAIT for Project Butter now lol but ICS can keep m happy for awhile.

+ better home shortcuts management. native app-folder with beautiful icons? winning.

+ dev options with CPU overlay is awesome. WAY better than task manager. touch and update overlay is great too for troubleshooting.

+ widget screen is great and FAST. some custom ROM has this but native ICS is way smoother.

+ ICS apps. Chrome is great. Current is nice and pretty. even Play is nicer. somehow. lol

+ notifications is cleaner and easier to use. (albeit no switches)

+ settings and option is cleaner with more info.

+ swype is much better. and the cursor arrows? full of win.

+ UI is cleaner and easier to use for a small screen. scrollbar and sliders are easier to hold. uninstalling apps and widgets and homescreen fooling around feels solid and easier to access. animations are more slick.

+ car dock actually works. it never works before.

Overall, it's worth all the hassle and crying and throwing tantrum the last few months ;) it felt like a brand new phone.

Just hoping that this leak is not the final build that Rogers is releasing soon (or whenever) and all the bugs/crashes i mentioned above are fixed by then.

either way, thanks OP!