We visited Sorrento for about 1 1/2 hours and stopped in Positano and a few other places for pictures. A lot depends on the traffic on the coast and how much time you have. We were on a cruise ship and had a hard stop time. We were at Pompeii for a few hours so there wasn't a lot of time on the coast even though the traffic was light the day we went.
We did the Pompeii and Amalfi Coast with them in October. This was a great tour! Both of our guides were knowledgeable and passionate about providing us information about the sites we visited and provided us ample time to synthesize the information they provided and explore on our own. The driver was amazing as we navigated the winding Amalfi coast.