Why "Best Smartphone forever"? Had been a few smart phones. The last were all from HTC: HD7, One S and One X. The HD7 I had repelled again quickly for Windows Phone. The One S I had exchanged after one year against the One X. Only with great effort, the device was possible to root. The Support by HTC was appalling. There was only one update for each device and then was the end. Then, so I had to switch on CyanogenMod. The display of the One S was very dark and gloomy. The One X had all day long WLAN problems. Oh, in short. Only theater with the share.
The SGS5 is a boon. For my taste, the portion is a bit too big, but just matter of habit. It could be within a few minutes. rooten. The battery is replaceable. The display is very bright and the colors really well. The Touchwiz the part runs smoothly. Have it in October 2014 and so far not had a single problem.
By communities, I was a bit unsettled. Samsung is always declared Plastikbomber. Does not bother me in the part. Feels good.
One shortcoming is the part but already. The USB connection. To connect the USB cable so you can load the SGS 5, I always need light. That's because so fiddly. Did it not even yet managed to connect it in the dark.
The battery life is top notch. My HTCs have depending on usage between 6 to max. 12 hours held. In the SGS 5 I'm depending on use at 16 to 36 hours. Could not be better.
In short: Best Smartphone forever.