SpecsUpdate
Country of originPeople's Republic of China
Parent companyBBK Electronics(OPPO)
Ranked in these QuestionsQuestion Ranking
Pros
Pro Light Android
OnePlus' Android skin remains close to stock android.
Pro Very fast
Pro Great design
Pro Still up to date
Cons
Con No compact line
They only build huge devices that are unpractical for one-hand use.
Con Camera
A focus for OnePlus in future iterations.
Con Lag can occur
It has a few lags, but nothing major.
Con Data collection & tracking
You can see on your routers that a lot of data is going back to the company.
Con Not vanilla Android
They use their own fork - Oxygenos.
For the record: All android manufacturers use their own version of Android.