Thinking of upgrading my current phone to either iPhone 6s or iPhone 7 but cannot decide. Obviously the 7 has some improvements over the 6s (thought the latter is cheaper), but I'm mostly interested in the camera performance. I've been looking at various forums, especially on Apple's website, where many are complaining about the quality of iPhone 7's camera. What's your opinion on the iPhone 7's camera? Is it much improved compared to iPhone 6s? Thanks in advance!