I've had it for a few days now, but I've also added the .442 bars that are compatible. They made quite a difference, in terms of Android app performance. I'd suggest doing this, to anyone who has already installed 10.3.0.296. Using Sachesi, it takes a little while but is otherwise painless.
With respect to some of the points made above...
- I'm not having any problem connecting to DropBox.
- The File Manager icons are a little wonky, but not a big problem.
- The camera app works better with the .442 bars.
- BB World doesn't seem too slow to me.