Been using this for a number of weeks now. No issues - good build quality and a seemingly uncoloured amplification.
As usual with class D amps, I'd question the power ratings, but it is driving a pair of q acoustic 3020s well enough: 12 O'clock is about as high as you can comfortably go. Between 9 and 11 O'Clock offers up a comfortable volume level. Given this, it's probably similar to a Class AB amp rated at 50 to 60 watts. Powerful enough.
I have not noted ANY 'hiss' commented on by reviewers on other websites. Very clean amplification.
For the money, this is an absolute bargain and highly recommended.