One barrel is good. Two barrels are better. Are three barrels great?
The Chiappa Triple Threat is an awesome gun, no question. The only complaint that you may hear is that the firing barrel cannot be selected. The rounds are fired in order, so if you want to put a slug in one or two barrels and shells in the other, your plan may not always work out.
Here is what BigDaddyHoffman1911 thinks of it: