I am using one plus X for about 8 months and this device has got no flaws .It is highly responsive and works almost without any lag.
Pros
- Excellent app switching, the device DOES NOT RELOAD the apps, it has a good ram management.
2.camera quality is good, especially it's 8 MP front camera does a good job in taking sharp and vivid pictures.
ENORMOUS amount of space as it support up to 128 GB of sd card(tip .64 GB is more than enough go for that).
One plus X is compact, stylish, feels good in hand, almost all portions of screen are covered in single hand operation.
5 excellent build quality I have dropped the phone twice, still it has got no scratches.
6.only phone in this category to have a 441 pixel per inch AMOLED screen.guys seriously screen quality is amazing somewhat like retina display of iPhones .
7.however battery is a small one(2625mah) while all the other phones in this category have above 3000mah but it works fine for me even after gaming and all sorts of social media the phone provides enough juice for a day.
- It gets heated on extensive use but that's just normal(MAX TEMP recorded 43 °C) .
Cons - none as I have got the oxygen os update within days after I got the phone. So no software tweaks
VERDICT- go for it guys