It's much smaller than the R1, even if I have to use a USB AA battery sled.
It will take digital-in, maybe, if the firmware is fixed.
It will record at 24/96 not just 24/44.1.
The firmware fix is supposed to start up new files seamlessly at the 2 GB limit, while the R1 hasn't updated firmware since the end of last year and has not promised this fix.
Len at Core Sound says the phantom power measures at only 30V, I doubt there is a fix for this, so folks who wanted phantom may be disappointed with it.
Still, I'm using my R1 until the MT gets shaken out a bit more.
Jeff