No negative comments - it was unfortunate for us that at the time of our visit the pool was closed as it was being cleaned, so we can't comment on it.
We stayed here for 4 nights. Overall, I would recommend a stay here if you want a pleasant, conveniently located hotel that does all the basics right without unnecessary fuss or costing the earth. Below are the details.
The hotel is a converted Vesuvian mansion located part-way up the volcano. It's easy to get to the top from there and is only a few miles from the Naples - Sorrento motorway for Pompeii etc. Alternatively, the local train station is a 10euro taxi fare away and its less than 2euros from there into Naples.
The bar / restaurant is an L-shaped conservatory that overlooks the pool and then down the mountain onto the Naples bay and islands. The views are great and the evening breeze is welcome. It has a modern look and feel to it, yet still manages to blend well with the mansion - stylish.
Breakfast is continental. Lunch isn't served. Dinner is available and, contrary to previous reviews, we found it good. At the time we were there the food came not from the hotel itself but from a separate nearby restaurant; we assume because it doesn't make economic sense to have a full service kitchen. One night we were taken to this restaurant and were surprised to find that it's actually linked to a private, upmarket establishment (Villa) that appears to be more than 3-star rated.
Our room was very clean, spacious, had a safe and everything was in good working order.
The atmosphere was relaxed and informal. The staff were pleasant and helpful. Their knowledge of english varied, but we were always able to make ourselves understood and vice versa.