Well, I had my first major Drum Replacement Moment tonight. I'd tested it out but this was the first time I used it to salvage a song. I'd used acoustic drum loops for a song with a strong dance influence and the loops were perfect from the standpoint of the part, but the kick didn't have the "slam your gut" sound needed for hard-edged dance stuff. I tried dragging a kick sample in to double the kick but attempting to match the dynamics meant I would have been working on Clip envelope gain for the next month...
But Drum Replacer worked great. I cloned the drum track, dialed in a kick (and it tracked the original perfectly), then set it for the kick sound only (no dry) and layered with the original drums. It was perfect...made a huge difference in the song, and I could dial back on the EQ I had added to the original part to try and give the kick more oomph. Definitely a happy camper about how it all worked out.