We recently updated our hotel reservation service and changed affiliation, which is to say that we are now with Booking.Com, part of Priceline.
In the process we simplified our hotel reservation page. It is now possible to select a list of hotels by choosing a locality on a map or in a list.
Booking.Com is the service that 3 or 4 members of our staff use when making hotel reservations, in Sicily and in other places. It works well, and the prices are at least as good as anything you'll find elsewhere. Many travelers consider it an advantage that - compared to most other online reservation services - this one usually permits you to pay at the hotel and not necessarily in advance. This feature depends on the specific hotel, however, so it is not universal.
But the system is extremely easy to use and very user-friendly.