Ive gotten my samsung s6 for 2 months now.
I love the multi-tasking function where I can minimise windows and use 2 apps at the same time. I love the camera, which produces really clear pictures, and has a huge zoom function. I like the new layout of Messages.
Unfortunately, my Samsung phone has restarted twice on me in the first 5 weeks, and in 2 months it suddenly stopped responding, despite me trying to call it or press buttons. Eventually it restarted.
Also, this phone has a lag time when unlocking the phone, compared to HTC One, my previous phone. Sometimes, after closing apps, it can also take up to 5 seconds to load the home screen.
Next, the fingerprint lock function doesnt work when your fingers are damp.
Lastly, Im no engineer, but the phone heats up a lot when fast charging.
Other than that, its still a great phone overall, and its interface is great. Not sure how it would compare to other android phones on the market now.