I am currently running the 904 leak since it hit about 3 weeks ago. I do notice a few things that I wasn't experiencing while on 902:
1) 3G radio is very sporadic; sometimes zero bars / no connectivity where I had at least three with 902 ( I live in the burbs West of Chicago)
2) LTE seems to be stronger but the 3G/LTE hand off is still lagging
3) Big hit on battery life; 12-14 hours on very light to moderate use; using factory extended battery. (used to have 28 hours plus.......)
4) BSOD is gone..... finally!!!!
5) Random reboots have become non-existent.
I am considering flashing back to 902 and waiting if the official OTA will scrub 904 one last time......