I bought one of these tanks with the intention of de-rimming it. They are of much better quality than the Marineland 2.5g. The black silicone gives it a unique look. I like your "overgrown" rock theme, will try something similar with mine. Good job!
You know, I really think the rimmed tanks wouldn't be so bad if the rims weren't so thick. If they only came down equal width of the silicone seams then it would create a much better impression on the tank. Giving it a "bold" effect, so to speak.
This tank rocks. So simple yet executed very well.