perfectly doing what it was designed to, don't buy it
I bought this product by mistake. I wanted a USB to ISS. When I saw my mistake, I just decided to keep and try the USB to I2C : it cannot drive all the I2C circuits because you don't have the custom I2C sequence feature. The rate is 4/5 just because this product should not exist. The USB to ISS is quite the same price and you should be able to drive any I2C circuit with it.