Its worth it. I purchased the Remora without the skimmer box, but had problems with all the microbubbles it puts back into the tank. The skimmer box is dark black and almost un-noticable (is that a word?
). I actually had mine in the tank for almost a week before my wife even saw it and asked what it is.
I circled mine in yellow . . . you don't really even see it back there: