Yeah, the Room algorithm isn't one of those "hit you over the head" sounds, but what they've done with the early reflections in that one is extraordinary. I agree, it does a great job with "amp in the room" sounds. Almost invisible when it's on, but when it's off, the sound becomes almost empty, you know? And yeah, by far the best reverb pedal I've ever used, too… and it does sooooo much more than just reverb.
+1 for the accelerometer!!