I have a 6 and my wife the 6+ We both love them! Since my phone lives in my front pocket, the 6+ was just too big especially with a case. The 6 with a basic Speck case fits about the same as my old 4 did. My wife always has her purse, so the 6+ with the massive case she got for it is a non-issue. Apple finally got the energy consumption down, and battery life is awsome. I am not a real heavy user, and have gottn by with 2 days without charging. IMHO, the 6 and 6+ are a much bigger step than any of the previous intervals, and if trying to decide between the 5s or a 6 it is a no brainer to me.
The cameras are also very good. Even though they are the "same megapixle" count as before and much less than the competitors, what is more important is the sensor size and density. The sensor is a bit bigger, the density is lower, so it takes less light to saturate it making it noticably better in low light than any other phone camera I have seen, which to us is important!