Ephesus is extremely touristy. Was greatly annoyed by the tour groups, especially one guide who found it necessary to gather his group in by honking this extremely annoying honkingthingie. It is a very nice site though, especially the library and of course the amfitheatres. If you wander around a bit you can distance yourself from the tousist masses a bit and enjoy the athmosphere. I would advice going very early, if possible, to avoid tourgroups and also the quite warm weather.