Other than having a high cost-performance, the fact that the OnePlus One has an open system has attracted many users. The Chinese version uses the Color OS while the international version uses CM. The MIUI operating system has also attracted many fans. According to Liu Zuohu has announced that the MIUI will be available for the OnePlus One at around June. This month, they finally released a video of running the MIUI on the OnePlus One phone:
As the video show, the MIUI V5 is very stable. Users can access the Xiaomi App store and other services. The camera and video player can also work as usual. Even though OnePlus has not yet released their own OS, if they can build a device like the HTC HD2, then, they should be able to make a good system.