Il Pellicano is not cheap, some reviewers complained about the price(s) and I disagree; this is a world class hotel and yes, poolside sandwiches and water bottles are expensive. If you want cheap water and snacks find a cheaper hotel.
This being said, my wife and I had an experience of a life time enjoying the beauty, service, amenities, and glorious Mediterranean view at Il Pellicano on our honeymoon. We did a boat tour around the south side of Argentario and took a day trip to Montalcino and Siena (2 hrs away), and Porto Ercole (10 mins drive). The property at Il Pellicano is lush beyond belief with plants, gardens, terraces, friendly staff, and delicious food & wine. Every single square inch of Il Pellicano is designed with incredible detail, style, and class. Save up and make it happen!