I now own two of these babies and they both perform as advertised.
They're among the cheapest on the market, WELL over half the price of a cloudlifter and yet they perform just as well. I'm using them to power sm7b and other dynamic microphones with a USB audio interface that otherwise would have too high of a noise floor.
The fact that you have the choice to plug it directly into the mic as it's an in-line device has the benefit of not needing an extra XLR cable.
There's not much else to say about it really. It does what it's supposed to and it does it well, without breaking the bank.