I own a Nexus 4, so I won't be buying the 5. Why change something that works great? It would be a great upgrade for those with the older ones though.
Battery life is great, as smart phones go. Of course, if you use the mobile internet while using intensive applications, its gonna die quickly - like any other smart phone. I have several friends with the S3 and iPhone 5, Lumia and they all have to charge their phones every night or they don't last the entire next day. Once you have to do that, it doesn't really matter if your phone lasts 10% more. I can't say about the S4 and the 5s but they are unlikely to be much better. Since LTE is not really a thing in my country and gonna be a thing for quite a while longer, the lack of it is not a problem. From what I've read most data plans make it pretty pointless anyway unless you are willing to pay A LOT. I have to say, the camera is inferior indeed. I was surprised how much worse it is than the S3 and the iPhone 5. To me, it is the only real con of the phone. Oh, and in my country it is not that much cheaper than the other flagships (20-30% cheaper).