I've heard conflicting things about whether to use DALVIK or ART. I heard that the Verizon version has had major issues with ART.
On the AT&T version, is ART running well?
On the AT&T version, is ART running well?
I am on AT&T. I have ART enabled on my Nexus 4 without any issues so when I got my G3 the first thing I did was factory reset and enable ART.
Worked ok for a few weeks but I don't know what set it off... what app caused the conflict... but my phone started hard freezing... had to pull the battery to reboot. After the 3rd time I said forget it and factory reset the phone and stuck with Dalvik. Going to keep it like this until they have an update either to 4.4.4 or L and then reconsider.
I definitely noticed the faster speed of ART but I had to switch back due to bluetooth audio stutter. For some reason on ART, my music through my bluetooth earbuds kept stuttering and it got so annoying. Going back to dalvik solved my problem.
So far 2 days on ART at&t and no issues. Battery life is incredible..