I love your work. Its my favorite terrain to date, particularly like the trees, and the smaller trees.
I'm not big on the water, though, just because its too dark for my tastes - de Borg's water will be my true love for life. Having said that, your water looks good, maybe just a touch more blending is needed between coast/sea.
Not sure about the mountains. The appearance is great, of course, but the coloration doesn't fit imo with the rest of your stuff. You use a lot of contrast, so maybe make the peaks bright somehow? And just a touch more of a light brown shade on the slopes?
But these are nitpicky remarks, and only because you asked for feedback. Your stuff is top notch out-of-this-world.