I bought the one plus one 3 years ago and got to say that I was more than satisfied. Sadly it got stolen but it was with me for about 2and a half years, enough time to admire it.
The performance of the phone was amazing. It didn’t lag a single time I used it. It had 3 GB RAM and a good RAM management. The touch and display was very good. I tested it with every heavy game and they ran on it like butter on bread.
The camera quality was excellent. The software that oneplus offerd was very good as it has a variety of filters and different beauty modes.
The design and look were great. The phone is very stylish and the design is admirable. The unique feature that oneplus has given to it was the sand paper back which gave a good feeling while handling the phone. Beside the design and performance, there were many features like NFC and gorrila glass protection which took the phone to the other level.
At the end, oneplus one was a great success by oneplus and was worth the money.