Sounds great, quiet, good feature set
I was feeling pinched in the wallet, rolled the dice and came up a winner. Great piece of gear. For $70, even better. No added noise, frequency response is spot on, pots are smooth without crackling.
The Mono sum button was an unexpected plus -- not all monitor mixers have this. In the analog days, this was easy but with DAWs, this can be complicated or time consuming. I had forgotten how nice it was to hit a button and have instant mono.
The -20dB button is great, too. Sometimes, you need it instantly quieter. Voila!
I wish it had a big knob like the Presonus. And it would be great to have a 5.1 (better -- a 7.1) version. A little more heft would be nice (I like the earlier reviewer's suggestion to double-stick tape it to the desk). Minor quibbles -- if I wanted the Presonus that badly, I would have found the extra $220, right?
Still 5 stars from me.