Surprised they went with no SD card support. Other than that disappointment, I like the s6. It looks great, the screen seems to be awesome, and overall it's an improvement. Even though it's similar to their older designs, it's more elegant. Definitely gives off the impression that it's a top tier phone.
I think the omission of removable battery and SD card will be forgotten quite soon once it's released. Yeah it's the two main differentiating factors Samsung had going for it, but I saw those two features being left out at some point. Instead we get higher quality screen, wireless Qi charging, and premium materials, I'd say it was a good tradeoff.
What I'm really interested in is the signal quality of that phone. My s4 is just about hopeless in some places and a friend of mine with the s5 has had more luck, but still compared to our friends with Moto devices, Samsung is far behind. (Yes I know the numbers of dBm and asu all differ from phone to phone, but the fact of the matter is, our Samsung devices have no signal compared to competing phones, in some cases).