The S6 is a good phone, but it's lacking in major things. The battery life lasts me about 24 hours or so, doesn't have an SD card, and you cannot remove the battery. These are the only major flaws that I have found so far.
It works great. I have enjoyed it's features and regular updates. Samsung pay is amazing. Only problem is it's eye tracking doesn't work and screen goes dark on you.
I just love the features of my Samsung galaxy S6, but the only downfall to this particular style is that the charger port wears out so much and I am constantly needing to get it repaired. But on a good note, the new Samsung Galaxy 7 has a different charger port so I am looking forward to upgrading to it when it comes out!