I have installed this Rom on my Ray, and I think its good enough for my new daily.
I am running a few things off the basic install, which works for me. I have a 64GB Class 10 SD card, which I have partitioned into an
*8GB Fat32 as my default SD card,
*2 GB Ext4 Partition to replace my default internal Data partition (I don't know how even with the partition changes you guys can fit all your apps... I previously used Link2SD, but found it a little buggy) see attached. Note that its in GB instead of MB

*The rest (about 50GB partitioned as Ext4 which I use for all my media (eg I have my whole photo collection, an MP3 library and a bunch of videos to watch when I travel to work)
*About 320MB as Linux Swap
* The dark kernel which allows me to go to a 1.8GHz OC
* Uninstalled some of the system apps (eg I use K9 to read my gmail so it went, I use Lightening launcher, so the stock launcher also went etc etc)
* Turned off zRam and enabled my 320MB linux swap
* OC'd to 1.8 with Interactive govn' I started with SmartassH3 but am trying this one as I think it sits on higher cpu
* Changed IO to NOOP schd
* Installed the CronMod INT2EXT4. I did it "manually" and not using the flashable zip (I wont be using ART)
Problems:
The WiFi works, but has been known to stop working, and then restart, just before I reboot to try to get it back
I think its probably my doing with the order I installed everything (I went straight to the other kernel before a single boot with the supplied kernel, maybe...) However, on about 4 out of every 5 boots, I have no phone signal and have to reboot.
Something that is always present, and I also found it on another 4.4.2 rom, is that when I unlock the phone, it plays the unlock sound as if it is stuttering/looping. Or, maybe that is the sound. I haven't found how to change the sound as yet to check it.
Apollo is working great and the DSP with extra features is working great, MX Video player is working (From the market and was unusable on a previous 4.4 rom) However, Google Currents has an annoying lag when I flip to the next page of a story (swipe left). It works fine under JellyBean roms I have used.