AV Switcher to increase inputs

Hi,

I know its not exactly HiFi, but I am considering using a professional AV switcher as a way of increasing amplifier inputs.

In particular an Extron MPS112 - this will give me 12 additional inputs and the specs don't seem too awful (0.08%THD+N at 1kHz, 90dB S/N), compared to the cassette decks and 8-tracks that will be plugged in to it.

These are cheap on ebay and a lot cheaper than the diy solution I was planning.

It seems like a pretty good solution to me, but I haven't found much online about anyone using these for audio, which could be a bad sign.

Has anyone else used something like this? What was your experience?

Thanks, Jon