I will be using mine on the 2 bus for my next mix, but that is only because I am mixing in analog. If you are mixing in the box, there are plenty of tape saturation plugins that are less expensive and much easier to use. The DECO does have its own sound, however, and it's very different from my Kramer Master Tape, for example.
To capture a 'recorded on tape' feel, however, just strapping tape saturation across the 2 bus is generally considered to not be as effective as using it on every instrument bus, or even better, on each individual track when recording.
In my opinion, the DECO, while sounding very nice, is also very dark sounding and not as versatile as a great tape saturation plugin if you are going to use it in this fashion.