This is a real plus for the M3. It gives a real new dimension greasy bass, pads deep, strong and crystalline leads.
The real downside for me is the difficulty of controlling the parameters of the Radias.
Indeed, apart from the conventional parameters (cutoff, resonnance ...) we have little direct access to the M3 to control the EXB-Radias. Therefore almost obliged M3 Editor. And there is a little bit frustrating as practical while the mouse!
Or touch screen but frankly all the knobs to fiddle ... Big headaches.
A dedicated controller such BCR2000 could be the solution. Still need to know the set.
In conclusion, I would recommend on occasion, but at the cost of nine, all moving towards a Radias rack which has all the knobs for direct access.