[Sony Xperia Z Ultra] trellva25:
The following is just my own personal opinion and my experience using the z ultra...originally i had a note 2 and the moved over to the z ultra...after 3 months i sold the z ultra and bought a note 3 which iam very happy with. The main reasons why i decided to switch to the note 3 are as follows;

1) At first i didn't really mind the size, in fact the main reason i bought the phone in the first place was due to size. My main use of a smartphone are media consumption first and communication second. although the z ultra is a lot more portable than some 7 inch tablets, its still pretty big for a phone. often times i found my self getting frustrated due to not being able to fit it properly in some of my pockets. Unless i went out with a bag, i had to think carefully about the types of clothes i had to wear just so i can carry the z ultra. The note 3 seems to provide a big enough screen while not compromising portability, now i don't have to dress for the phone anymore.

2) the screen is not as good as i had thought. Now i have to reiterate this is my own opinion: after using the z ultra i found that the screen had some flaws which i just couldn't get over. The black levels are poor compared to other LCD like the htc one and LG G pro. When looking at the screen in bright ambient lighting you wont notice how poor the black levels are, its only in dimly lit light that it becomes evident, now i use my phone a lot in a dimly lit bedroom so it becomes an issue. The blacks also wash out becoming milky white if you view the phone off angle, the color does not shift, only the color of the blacks...this issue is not as apparent as like the xperia z. but its still far worse compared to other flagships out there.

The screen is very bright even at the lowest setting, i had to use a screen adjuster app just to get the screen to be comfortable to use at night.

X-reality is pure garbage, sony replaced bravia engine with x reality, why they did this i will never understand as x-reality brings along image sharpening and grain which makes videos look unwatchable. But turning it off makes the screen look washed out. I compared every phone i had to the z ultra without x-reality and the z ultra was the worse of the bunch. One color the z ultra the z ultra seemed to have trouble producing accurately was green, compared to other high end phones, any green that's not dark green always appeared to look yellowish green.

One issue i found annoying when viewing pictures and videos was that the screen had poor gamma levels. skin tones appear too bright for what they should be and shadows appear too dark. watching dark scenes was just unbearable as all the shadowy areas would loose all detail and look all black, while the faces especially for light skinned people would look pale white. other phones would show details in the shadows and skin tones would be full of color.

3) sound quality is pretty bad, coming from the note 2 i thought the speaker sound wouldn't bother me, after a few weeks it become annoying as the z ultra has the worst external speaker on any smartphone i have used.

4)The camera is complete utter crap...now i dont take photos much, and i didnt think it would be an issue, but the few times i did take pictures always thought of the note 2 which i had sold off to buy the z ultra. If you like taking picture, do not buy the z ultra.

5) the sony UI is very beautiful and snappy, but after using lg pro, htc one x and note 2 and 3 i found it the least functional especially when it comes to calling and messaging. don't have time to elaborate on this one.

6) The font and icons are so tiny, this for some people wont be an issue but it was for me. even though you can view more content on the z ultra screen, everything is so shrunk down that reading on the thing becomes straining on the eyes. even when you increase the font size in the settings menu, some apps still show font too small.

After a few months i just could not stand these flaws and sold the phone to buy note 3. So far i couldn't be happier. I can carry the phone with no issue, the screen is vibrant and clear with multiple modes to choose from. skin tones look better and shadows are represented accurately. sound quality is vastly improved, the list could keep going on.