It is a pleasing image for sure, although I do agree it appears too dark.
It will take a while to get my head around these CMOS cameras and short exposures, but longer and/or more subs might help. The stars seem to have a blue fringe on one side and red on the other. Chromatic abberation? Not sure what to call it, but I've seen it on my own images and I try not to process this into the image.
Other than that, well done, I like it!
