I use one in front of a Behringer DEQ2496, as a source selector and upsampler, and for my FM tuner, a ADC. The upsampling seems to give the digital output of my old Squeezebox Classic a little more resolution. I use a short AES/EBU digital cable between the two Behrs (from there it goes to a Monarchy DIP, then a Channel Island DAC). Added the SRC last spring, so far it's been fine.
I would recommend if you are going to place this in front of your DAC, try the different outputs to see if any generates extra noise. I got the best results using a Wireworld Supernova 6 optical on the output of the DEQ.