Personally, i never like it.
2 reasons, weird phasing going on and lack of dynamics.
Maybe it works for metal when the gain is maxed out but for anything else is pretty useless. For exemple, a modern rock rhythm tone is often achieve by blending 2 amps, one of witch is way less distorted. (That's where the dynamics comes from) I'm not sure how you could EQ match that less distorted tone as EQ match is terrible at clean tones.
What do you think? Anyone has any special trick up their sleeves?