It works. The AD/DA converters are reportedly good, but I have never compared it with anything else.
My unit makes a loud crackle when I first turn it on. This scares my cat. Luckily I don't actually have a cat; but I still keep the monitors turned off until it powers-up.
The knobs are small and twiddly.
If you use a mac, then this, coming from Mark of the Unicorn, is probably the best audio interface to get. Which is why I got it.