I haven't done it, but what I've gathered from the guys who have is that the Navy CD-ROM course is much like drinking from the firehose. I too have heard that the AF course is much friendlier, however, the current rumor mill has things changing a bit in the JPME world and in the near future, the AF course may not be considered as JPME 1 equivalent, at least as far as the Navy is concerned.
I currently work at NWC, so if you would like some POC's for our Distance Ed folks, PM me.