I'm reasoning about to visit Hotel da Carmine at Ogliastro Marina, but I have not found any visitor's review and/or notice of it. I would greatly appreciate any information!
Have you tried http://www.tripadvisor.com
They have many hotel reviews and are very good. http://www.booking.com also has a lot of reviews.
Very good friends stayed in Villa Sirio, not the hotel you mentioned, but it is gorgeous and pretty reasonable. It's right on the water. They absolutely loved it. Here's the web site and you can have a look. http://www.slow-dreams.com/default.asp
We've found that other people looking for this hotel also know it by these names:
Address: Via Flavio Gioia 25, Santa Maria Di Castellabate,