I've been to Il Melograno several times and have sent friends to stay there as well. They have all returned from their trip thanking me for recommending Il Melograno and telling me it was the best part of their time spent in Italy. It's a wonderful base from which to explore all the Maremma has to offer - 5 minutes from the Thermal Baths and charming town of Saturnia, 30 minutes to the picturesque Pitigliano, 45 minutes to the seaside, etc, etc. If you feel like staying nearby, you can walk up the hill to the quaint town of Montemerano.
One of the best parts of the hotel is the attached restaurant - "La Verdiana". Without a doubt the most memorable meals I've experienced in Italy. A great way to spend your evening after daytrips around the countryside....and when your done eating and drinking you only have to walk back to your room.
The hotel is spotless and all the rooms have their own balcony with nice views (ask for the rooms on the upper floor as they have better views). Another highlight is the breakfast that you'll wake up to every day - be sure and eat the ricotta with honey drizzled on it...
Also be sure to visit the thermal baths just down the street.