Before I bought my Remora one problem for me was the noise reviews, they were all over the place, some said loud some said quiet. I've been pleasently surprised with mine, I can't hear it over the light fan or the mini-power filter. And even with the lights off it's barely noticeable. It's in my living room so it's not like it's hidden around the corner.
That is one thing to be aware of with the Remoras, some are louder than others...