I found CB while I was looking for info regarding board recordings & am glad I did! I do mostly location sound recording, using a Fostex FR2 digital recorder & various Sennheiser, A-T & R0de mics... Mostly for my own passion regarding sound (Phonography), as well as providing sound for video...
While I can't comment on the DR-1 internal mics, I have been using the DR-07 for a couple of months... The main complaints I would have regarding using the internal mics would be-
1) The handling noise on the unit is quite loud. I've tried using a glove, but that hasn't resolved the issue...