The Carlos V Hotel is one of the most brilliantly located properties in Alghero, it's right on the sea front, with amazing Mediterranean views it's in a relatively quiet residential area so total silence (and amazing sleep) in the night time.
The facilities are wonderful: our room was huge, with nice added benefits like bathrobes, slippers, quality toiletries, bottled water (still & sparkling) provided daily. Cleanliness was incredible - the hotel obviously has high standards - this was one of the cleanest hotel rooms I ever stayed in.
The staff are wonderful, very friendly and accommodating - especially the reception staff .
Food - we didn't avail of breakfast or the half board evening meals... but we did have lunch in the poolside bar a few times, and it was excellent quality, and reasonably priced. They also have a fantastic wine list!