We absolutely loved our stay at this hotel and would happily go back time and time again. We honestly couldn't find a thing to fault - the staff were so accommodating and willing to help with any enquiry, the pool was big and spacious even when busy with lots of guests, the food was delicious and had plenty of variety, and we also booked a couples massage for while we were there and it was amazing.
Our tips if staying at this hotel - 1. you absolutely need a car, while it's close to Castellamare di Stabia train station, you still wouldn't want to walk as its quite far and doesn't have sidewalks to safely walk down. If you have a car, you can also do so many day trips - we did Pompeii, climbed Vesuvius, Positano, Sorrento and a boat trip to Capri - all fantastic.
Secondly, another tip if you are into food - book the restaurant Piazetta Milu in advance. It is a Michelin star restaurant an 8 minute drive from the hotel and it was absolutely insane - highly highly recommend!