[Sony Xperia C5 Ultra] kanej2006:
Finally bought my C5 Ultra last night! Overall I'm satisfied with it and there is more good than bad.

Screen is actually great AFTER calibration. By default the whites and colours are dead. For me, white balance is as follows; Red 38, Green 49 & Blue 40. Colour as well as the white and blacks are great and not far off from my Xperia Z3. So bear in mind the display does need a good calibration to get decent results.

After going through some high quality pictures and full HD 1080P movies and animated cartoons, colour is strong and black levels do actually look great, screenshots below of Shaun The Sheep Movie. Viewing angles are brilliant.

Speed. Generally the device is fast and responsive. It does at times pause and there is a slight delay. However, this should be fixed in a future update and when we get root access and recovery!

Looks. This was the key reason I bought the device. Specification is high mid range, a step above the Xperia Z Ultra, however, I wasn't bothered with the specification, it's gorgeous looks lured me into buying the device! As internet photos show, the left/right side of the phone literally has no bezel, the stunning display stretches out right to the edges. The top/bottom of the phone are still thin and the upper part is mostly taken by the huge 13mp camera with it's flash.

The bottom of the screen is still pretty thin and compared to my Xperia Z3, though a bigger phone, the bottom bezel of the C5 Ultra is still thinner!

As explained above, the screen by default is lifeless, colours are wrong and whites are more warm. You will have to calibrate the white levels in order to get decent looking whites and other colours...

Camera. I've not had the time to fully experiment, however, it is decent and photos are sharp and clear. Others have mentioned the camera is slow especially if selecting the memory card to store the images. Completely wrong. I took several pictures last night, one after the other and other than a split second delay, it was ready to take the second and the third picture. it's fast and responsive, no lag whatsoever when taking photos whether you select the memory card slot or the internal memory.

The flash is VERY bright and even when using the light/torch mode, the light was excellent, stronger than my Xperia Z3.

Gaming. Aside from Ski Safari, I didn't try any other game. However, colours were great, whites were excellent and there was no lag or delays at all. Nice and smooth.

Whether surfing the web, gaming or using the camera, there was no sign at all of overheating, in fact, the phone never even got warm when using for long periods! So no need to worry about overheating or getting warm.

Body/Build quality. Although the rear of the phone is plastic, it's a very high quality plastic, very strong and it's appearance is good. The sides of the phone are a solid aluminium and the front is entirely glass. Build quality is very sturdy and overall excellent. There are no gaps around the phone/bezel and the sides are well put together. So far the best design I've ever seen from Sony.

I was actually going to wait and purchase the Xperia Z5. Once I saw the design was VERY similar to the current Z2/Z3 series I thought why buy the Z5 when it looks too similar to my current phone? I wanted something different, unique and affordable. This is where the C5 Ultra fits in, perfectly...

Battery. Unfortunately, since I've only just used the phone for several hours, I'm yet to comment on battery life. In fact, I've still not even charged the battery, not even once. Battery was around 61% when the phone was first turned on. After around 2 hours of on screen time, some wi-fi, phone calls, sms messages and camera use, battery is still around 22% .

Speakers/sound - I'd say decent but not loud. My Xperia Z3 having dual speakers was around 25% louder. That said, we can only pray that sooner or later, a developer can release custom sound for louder, clearer audio having dual loud speakers when listening to music, watching movies, gaming or simply when making a phone call. We simply need audio output via the upper earpiece to give us stereo sound. Lazy Sony, unfortunately didn't bother doing this...

Verdict. Based on the above, I'd give the phone 8.5/10 for overall use/features/looks/battery, etc.

Some screen shots of the phone and screen: