This is a wonderful place. Luckily we visited off-season, when room price was more affordable. Easy car parking; staff rush to take bags and to proffer umbrellas if you arrive in a downpour, as we did. The view from our window of the Temple of Concord was unsurpassable. In more clement weather, we could have eaten on our private terrace with that amazing sight as a backdrop. The bathroom shower was the best ever. There is an attractive, airy lounge area with books to look at.
The restaurant is across the driveway, which meant dashing through pouring rain (and even hail!) for dinner and breakfast. Staff are charming. The restaurant entrance has a glass floor beneath which you can see an excavated Greek stone cistern/wine store. Prices on the menus were not outlandish. One weird thing, though. Many dishes had €" in the price column, which we at first took to mean those dishes were off that evening. However, it actually indicates that the price is the same as that of the dish above.
I was a bit disappointed not to find freshly squeezed orange juice on the breakfast buffet, since we seemed to be surrounded by orange groves, but maybe I was just unobservant. The coffee machine produced dreadfully stewed coffee, but we realised the next table had grabbed a waiter and requested fresh cappuccino, so we did the same. The cooked breakfast isn't laid out, so again you need to ask a waiter for that.
It was a short walk downhill to the entrance to the temples site, and a short walk uphill to Agrigento's comprehensive archaeological museum.
All in all, a perfect situation, and a lovely place to stay. Highly recommended.