[Galaxy S 4 General] puremind:
Received my S4 today. My impression is positive in terms of smoothness of use. The bigger screen is nice but a bit dim. Judging by eye grey balance is OK for film viewing in film mode.

The hygrometer works (only 3% difference to my hygrometer), but the temperature is overestimated by 3 degrees.

Too bloated, craving a clean ROM.

Eye features and gestures are pretty useless for me:

Eyescrolling works but it follows my head, not my eyes.

Eyescrolling is too slow, so that you first have to make it scroll for 5 seconds and then you can continue reading. Also scrolling back up to the start of the page should be quicker than scrolling down. Also when you want to press any button it will scroll down, because it thinks you want to. That's the most annoying feature for me.

Smartpause does not work in Web Browser or Youtube. Doesn't add enough value for me to sacrifice battery. But the good news is you can deactivate it to conserve battery.

Airgestures are not as confortable as touch gestures

Airsense (or whathever it is called) lets me highlight information in flipboard and browser, but it will need more support

All of these are (in my opinion) needlessly competing with the screen for battery, I am interested in user views that end up using them on a daily basis and don't miss the extra battery they could get from deactivating them.

Other impressions:

I like the hygrometer, I just wish the humidity could be shown on the notification bar. Maybe there is a widget that can do that for me.

The camera is having a harder time stabilizing and focusing than on the One, so you need a steady hand. The One does sharper pictures for me in most situations, including low light (shows the limitations of theoretical tests and camera comparisons performed under controlled conditions). The camera app has got menu items at the top. They are small and hard to reach on a screen of that size.

I have to go out now before the sun disappears (screen test) - I will post screen measurements later. I can't comment on battery yet.

My device doesn't stutter, but I received a firmware update, so may be down to it. It is slow to open some menus, though. There is a lag there, for example in the camera app.

The sound is not bad, volume is good but it lacks tops and bottoms.

So overall what do I like better than on the One:

Screen size

WiFi and 4G speeds is superior

Feels comfortable to hold and type on

Hygrometer

Button feedback

What feels worse:

Design

Brightness

Sound

Bloated - I will breathe better with a custom ROM

Some elements of the interface are a bit dated (e.g. size of menu items not adapted to 1080p display) - nothing a custom ROM can't fix. I seem to prefer the clean Sense 5.0 interface.

Both are good phones for me. what I will test next:

Battery

Screen in film mode

---------- Post added at 07:42 PM ---------- Previous post was at 07:32 PM ----------

If I worked for HTC; I wouldn't have needed to elucidate the different display types, and my tone in that thread would have been different and I wouldn't have uncovered and criticized different display calibrations/brightness levels on different units, or would I? ;)