Worth it. FiiO X1 is a brand new portable high-definition lossless player launched by Guangzhou FiiO Electronic Technology Co., Ltd. in 2014. It is known as the mastering level - a new starting point for lossless music. Second-hand FiiO's optimization and improvement of the buttons on the X1 are very worthy of recognition. All buttons adopt a concentric circle design, and the key travel and feedback are excellent. The height of the four buttons and the assembly errors are also very controlled. good.