Presonus M80 for Summing

I have the opportunity to pick up one of these cool old M80 Personus units. It can be used as an 8 channel pre and a summing box. Each channel has a transformer saturation knob. Has anyone used the M80 for summing before? How were the results?



This is an M80 without Jensen transformers.

Presonus M80 for Summing