I am still on this 4.4. Been there since Dec 30th

It has worked pretty well. I have installed about 30 apps and games and everything still is working well. using stock launcher (not onda launcher). battery life is about the same as 4.2.2 for immediate use. however the when in the quick boot power off state, it uses more. about 10% over night. overall speed of the rom is the same as 4.2.2 It is a bit snappier responding to touchscreen inputs.  I have not has any FC or app hangs in this version like i did with the demo. 

Compatibility with apps is not that good. No financial apps will install and like stated above google+ will not install. This was also the case with early 4.2 onda roms until some creative build.prop hacks and others. I believe it is because these apps require location info from a gps and there is no gps in our tablets. a hack should be able to allow these apps to be installed.  The Kasty roms had this hack preloaded. perhaps when onda releases the full version Admin will create a Kasty version.

It seems to work well for me, and the apps that won't install are not important enough for me to go back to 4.2.2  If it starts acting up I will not hesitate to go back though.  

except for integrated printing and a few ui changes there is not much to gain with this version of kitkat. looks like Onda removed the option for ART between demo and beta releases. Mainly because it does not work. There still seems to be issues with ART with devices that support it so It can sit this one out as far a I am concerned.