I have a Nova Special Purpose with ghost ring sights. This is my second Nova, and I prefer it over the other pumps I've owned or used so far (Mossberg and Remington).
The good:
It's light, tough, and easy to field-strip. It chambers 3 1/2" loads, and the magazine cutoff button in the pump handle is nifty. The receiver is polymer-coated, so there are absolutely no corrosion issues. The buttstock takes an optional mercury recoil reducer. The pump handle is large and easy to operate. The world record for hand-thrown clays with a pump was shot with a Nova. Also, those Italians sure know how to make 'em pretty.
The so-so:
The pump handle has a tendency to rattle a bit. The recoil with 3" Magnum or 3 1/2" loads is pretty savage due to the light weight. The oversized pump handle means that you can only mount a mini 4-round side saddle. The magazine capacity is low, only four shells in both 2 3/4" and 3" formats, and the mag extensions are scarce and expensive.
All in all, it's a great shotgun if you can live with the mentioned limitations. The Benelli Nova is stylish and capable. Althoug a Remmy 870 or Mossy 500 has much more available in the way of accessories and doodads, if that's your cup of tea.