Just got M8!
Just got the M8. I am loving the phone so far! I'm coming from a Nexus 4 and am very happy with the M8 so far. I did have some texting issues yesterday where like 1 out of every 10-20 texts would fail and I'd hit resend and it would resend the text (along with a few duplicates). I did a factory reset and switched from Hangouts to the stock messaging app and that seems to have solved the issue.
Aside from that, this phone is amazing. It's lightning quick and is extremely responsive!
Current Device -- HTC One (M8) Google Play Edition
Previous Devices -- Samsung Captivate | Samsung Galaxy S2 Skyrocket | Nexus 4