[Xperia Z General] Andrewtst:
Screen - I quite use to the viewing angle already --- just sometimes I notice the white turn to slightly yellowish at bottom part when not in straight view. The screen never washed out for me. Mine was Sharp panel, you can check your panel here - http://xdaforums.com/showthread.php?t=2182432

White Balance - It was slightly warm by default, highly recommended install the ZL White Balance Control which let you tune the screen much better. Now my screen was correct white balance after change the setting to Saturation 9.0 and Hue 215. Get it here - http://xdaforums.com/showthread.php?t=2190293

Loud Speaker - The origin bundle is too low volume and hissing sound if using dance song as ringtone. This problem can be solved after install the great PureXAudio mod. Get it here - http://xdaforums.com/showthread.php?t=2190558

Bundle earpiece - Origin sound was a bit flat due to no bass, again using PureXAudio with setting of PureXHiClarity + Surround sound (VPT) as Studio, now it sound strong bass with clear vocal clarity. Edit: v11 just out and it was even much awesome, now I only use PureXHiClarity setting.

Heat - It really heat when playing games and watching movie. When I checking the temperature, it actually quite similar with my previous S III, more heat feel probably due to it slimmer design.

UI Smoothness - It was pretty smooth, but I believe it still can be much improve especially opening the Phone still can notice slightly less smooth on animation. But this was far far better than my previous S III already.

UI Design - I highly recommended flash the DoCoMo edition which change gray notification and navigation bar to awesome black + 10 toggles in notification bar instead of default 5 toggles. Also the extra useful add-on of Close all option at Recent Apps. Get it here - http://xdaforums.com/showthread.php?t=2202383

Launcher Design - It was pretty and nice, but miss the Infinite scroll in Launcher and App drawer, also it will be much better if it remember your current page at App Drawer.

Performance - I just compare with my friend Note II, both phone seems open same apps constantly.

Browser performance in Chrome - This is the happy part :D I try every website by clicking simultaneously, every website load much faster in my Xperia Z than Note II.

Camera - It was clear but less sharpen in details and noticeable over noise filter processing but still ok. Hope future Sony can improve the camera apps. Less processing, high quality jpg setting, or at least let user choose jpg quality preferences.

Small Apps - I much prefer this small apps compare with Samsung Multi-Windows which I find Multi-Windows still useless even in 5" screen. Recommended install the Small Torch, you can find it here - http://xdaforums.com/showthread.php?t=2190508

Bravia Engine 2 - This is a great enhancement especially watching video, I not so like in image as sometimes I find it over vivid + whatever nicer you seen at album change when apply as wallpaper, I use QuickPic at the moment. Also, too bad Bravia Engine 2 never work in 3rd party apps, I do hope it get options to tick forever on, or at least let me use it at main launcher wallpaper part.

Navigation Bar - Default 48dpi is quite waste space, I use 36dpi version, get it here - http://xdaforums.com/showthread.php?t=2202383. Also I use fullscreen+ to set specific apps, especially all games run in full screen without navigation bar, this app is awesome and I find it much better than LMT. Buy it here - https://play.google.com/store/apps/details?...jcmVlblBsdXMiXQ.

Bootloader - This is the tricky one, and I not welcome Sony idea, once you unlocked it you will forever missing the Bravia Engine feature. I know Sony did this basically was prevent user leak out and aware the special setting did by Sony. I don't want to miss this as I find it well optimize for video output, which means I can't unlocked it. This do make some difficulties to me at least for now where I can't try any custom kernel.

Root - I recommended root as all features/enhancement to make your Xperia Z much better and great do required Root. Root won't lost the Bravia Engine 2 feature as long you never unlocked the bootloader. I use this http://xdaforums.com/showthread.php?t=2186368 root tools, latest version is 1.0.2 where you can get it from official Japan site - http://blog.huhka.com/2013/03/root-xperia-...rootingkit.html

Did I regret buying Xperia Z ? - Definitely not. :)