All things considered, I've had a fair amount of issues with the crosswalk wrapper. Back button binding doesn't work, CPU utilization jumps (not a game logic issue, even a 10 event game burns battery), home button hard crashes the app, window button works, but when you go back to the app it can sometimes hang, and other times the sound cuts out. There are also issues with script minification (though, there issues with that in regular HTML5 export as well) and gamepad support doesn't work (using r161) on Android. At least, I haven't been able to get it to work with an Xbox360, or a PS3 controller hooked up to my N10. Obviously a limited testing environment, but still...
I think I might hold off on deploying to the Play Store until the wrapper is a bit more stable. Don't want 1-stars because the wrapper keeps crashing :(
Oh, also, exported app (pre-crosswalk) 18mb. Installed app on phone, 58mb - what?