The super amoled technology has always been Samsungs shining star, but they now have the processing speed to avoid any delays or lock-ups on the Galaxy s6 that frustrated customers on the s4. The rear glass panel and internal battery design has its flaws, however. The back is extremely fragile especially when compared to the nice grip surface of the s5. I purchased a Samsung cover that encompasses the four corners of the front glass, and when I attempted to remove it to clean the sides and back I actually damaged the corner of the glass. It's that fragile. Not having access to the battery means that if you drop it in water, the phone is done. There's no way to get the battery out to stop the damage to the motherboard.