So I've had the phone for about 10 days now, and I like it, but I don't think I'm going to keep it. Battery life can get me through the day but it's not great battery life, and the camera is capable of taking great pics at times but I feel it's a downgrade from the Nokia Lumia 920 I had. Actually, the best shots from the Nexus 5 camera are about on par with the best shots from the Lumia 920, but it's easier to get those shots from the Lumia. The Nexus sometimes has issues with focusing. I was hoping for an upgrade from at least one of those two areas.
Other than that, the performance is super fast and I haven't seen hiccups anywhere (I also have ART enabled instead of Dalvik).