Got mine Wednesday . Coming from a GS3 it takes some getting used to. Some things that are a gripe=
*no links in emails using the stock email client and the new email client isnt as nice loooking compared to the 4.3 version. In other words, a email notice from this forum, you wont be able to click on a link to get here.
*speaker could be louder but its not horrible
*no number badges on email or Hangouts. Whats up w/ that? I do get them with Textra but not while using the Google launcher.
*cant figure out how(dont think you can) to change bubble colors in hangouts as both mine others i am texting are the same white color,but i can always use another text app and i do like Textra and Handcent a lot.
* No way to make the LED any other color or to work with apps. Its not even an option at all in settings that i see. It only goes white or blue so far and you dont choose colors.
*Music player(i use PowerAmp) with earbuds sound great on this phone(not a gripe). Google Music sounds better and louder w/ the N5 compared to my GS3.
* I used Ringdroid to make ringtones on my GS3 and they would go right into my ringtone list and id check it and it would work. Doesnt do that on the N5. They go in the list but do not work. I had to extract them from my GS3 to my PC desktop and drag and drop them in the ringones folder on the N5 and then they would work.
*Battery life isnt great. Ive went 12 hours of pretty moderate use and it was down to 12%. Hopefully it gets better after 3 or 4 days
Hopefully an update fixes some of these but i really do like the phone and like it more everyday.