I usually shoot with an over/under but I do own an 1100 and actually am waiting for another one to arrive that I picked up cheap on a forum. All things considered, a new shooter looking for something to use while he learns the game (regardless of whether its skeet, trap or sporting clays) is well served with an 1100. It's all anybody actually ever needs and for the money, it can't be beat. I intend to use the one I just bought as a loaner to get people started.
On the shotgun forums we always get the "What over/under shotgun should I buy for $500?" question. My answer is always, "Get a used Remington 1100 instead."