The hotel is falling apart. The rooms are rusty (not a metaphor), tired, dirty, but appalling facilities, ugly bedding, unpainted walls, old systems... Truly truly ugly. Rooms are terrible in a nutshell.
The rest of the hotel is not bad. Location is good, you can hear the waves at night, the pools are nice, breakfast is served in a nice location overlooking the ocean. One problem with the pools is that parents let their children treat like a kindergarden facility with their children screaming their heads out without any restraints from families or staff. I had to leave due to the noise. Unusual for me, but it was seriously loud.
WiFi quality was poor, staff were slow (a common thing in Chile, old fashioned systems die hard) but pleasant (not the norm in Chile), and there is plenty of free parking (you need a car in Arica).
This review isn't complimentary BUT this is the best Arica has to offer after looking around in terms of accommodation so you may be stuck with this property.
One word of advice to management: Please fix the rooms, you cannot have rusty appliances, broken curtains, peeled walls, dirty linen. Please, this isn't that hard.
I cannot not recommend it because the other options seemed much worse in Arica