I have a Nova in 12 guage and love it! Great shooting and pointing gun. I just patterned mine with a Primos "Jelly Head" choke and Remington 3" #6 hevi shot and was very impressed.
The gun takes down very easily to be cleaned. Only problem some people have is that the forearm is loose. This allows for dirt and crud to be in the action and the gun will still operate. However you can tighten the allen srews at the rear of the forearm ( NO MORE then 1/10" of a turn at a time) and this will help with the rattle.
Good luck and enjoy the new gun!!!