The price was right for me with this piece of gear and thinking I had a lemon, I quickly purchased another one (deadlines were on the horizon!)
The switches started sticking and then, this weekend.....the headphone output croaked. I believe it was around the same period of time the first one croaked.
So the same identical things happened to two units by this company.
If you are looking for something to switch monitoring and has a headphone out....take caution when thinking about purchasing one of these things.
I rarely write something like this. It could have been coincedence, but two units?
I am sure others are using them with no issues. It's just the luck I have!

Just my .02!