When this concept first came out, I predicted it would fail due to inaccessibility (the tiny hole) and the inability to upgrade lighting. Well, so far one of those points is out the window, I really didn't expect anyone to start DIY'ing one of these. We'll see how accessibility works out in the long run, seems like it might be an extra hassle to clean this thing, but I have only seen it in person once, yet. I did notice it had some decent dark spots all around, but that was stock lighting. Anyway, good job on the upgrades, guys, and good luck with the new tanks.