I'm on 611, and while the camera is not working I simply love the ROM. My first and only 3rd party ROM on the tablet what I really love. Sadly in my case it has brutal battery drain, just did not have enough time to test it deeply. Basically I use it for months, but the battery drain so high that I basically have to use in 'on cable'. Without any active usage, it could drop to empty in 1-2 days, but with active usage it could fully drain in just some minutes (10-45 minutes). The battery state is totally random, sometimes it can drop by 1% in every 30-60 seconds, sometimes it can drop by 10% randomly in just one step, and in lot of case the device just shotdown itelf at 60-70% battery, when in powered off state the charging screen shows that it charges only the same 20-30%. But there were more situation when it shutdowned at ~60-70% when the next charging screen showed the charging from 10-20, or empty state. The processes, results are totally random. Before this ROM, with stock Android 6 there were no problem. Not just such, but nothing.
I'm not compain about it, as 'thats all', this is my problem, and from any other aspect the ROM for me is really great, the best one until now. I just wrote my lines because the 'battery problem question'.
If I will have time for it, I will try to res-stock, and if on that will be everything fine, than flash this ROM again, to check what happens.