I am still pleased with my 9850 and from reading thru some other sites there seems to be some who have not had good experience with thier 9850's (due to hardware) issues. I have not had any problems and continue to enjoy the user experience with 7.1.0 Bundle 457.
I especially like using the bridge feature with the Playbook and from time to time the "remote" control. I do not see major op issues and typing is still good but I do hit the "b" key when typing fast and spell check gets me when I don't read final before I hit send. But the screen size is key for me as I do not have problems operating an all touch device.