I have yet to see a nice clean setup using a coffee table tank. All the ones I've seen look, well, pretty horrible. Cords across the floor, no light, and murky water.
One was oval that had basically a shop light sitting in the middle of it to light up the tank, with cords running down the side and into a raceway across the floor. Constantly tripped over it.
The other one I saw in person was just horrid. Very dark and murky. No lights, the only filter was an airpump driven UGF
. Needless to say not much thrived in these tanks. Also when walking nearby the fish would freak out. Setting drinks, feet or practically anything on the table also made them freak out. Constantly stressed fish from getting bumped, kicked, etc.