Yup... we've been to Pompeii, and it's awesome. It's best seen with the aid of a good guide, who will fill you in with stories of the history.
We did Pompeii from Naples, along with a drive down the Afalfi coast to Sorrento. Truly beautiful scenery.
There's just SO MUCH to see in Italy (and all of Europe in fact), that if time is limited you really do have to just pick out a few spots to enjoy..... and then make sure you go back to see more another time.