I'm with earlier reviewers PrincessSparkleUK, Kitty548 and tmren on this one. First things first, hotels in Ibiza are notoriously expensive. You also have the extremes of the super cool new places with prices to match, down to the more notorious apartments on Playa d'en Bossa (and San Antonio) which are 24/7 party, noise, crime etc.
If like me, you fall somewhere between those extremes, then this is a good option. You can actually sleep and feel secure, without paying rock star DJ prices! It is well located in the old town. Dalt Villa and all the bars and restaurants are within easy walking distance. Playa d'en Bossa is a longer walk or short cab ride. We parked our car in the (small) underground car park free of charge every day without a hitch (in September, mind). It has a very low roof and tight corners so don't bring a bigger car.
The hotel staff were very obliging and helpful. We did not eat in the hotel, but did find the rooftop terrace and pool a nice option. The associated cafe was decent for a coffee too. The gym we did not use, but it is not particularly impressive looking. But I don't go on holiday to Ibiza to do a workout!
As other commentators have said, the decor is very much "jaded 4-star 'glamour'" that is looking quite dated. But this did not distract from the comfort or cleanliness of the hotel, or the pleasantness of ALL the staff we encountered over 5 days.
(Associated rant - you may wish to skip - Spain is an awesome country that millions of people rightly wish to visit. Tourism is one of its main industries. The economy has been struggling post property bubble in the crisis years. There are masses of these old (Franco era?) jaded hotels all across the country. Think fake wood laminates and ersatz gold plating. Out of date televisions and air conditioner units. How about Spain/EU sets up some kind of fund to rebuild / modernise much of its ageing tourist infrastructure, as a good way to boost their economy?)
The immediate locale of the hotel is not particurly pretty, with scrub land and a dog walking park right in front. The neighbouring streets also house lots of 'clubs' that don't appear to conform to the usual image of Ibiza nightlife (see associated photos!). However, i did not venture inside any of them, so cannot confirm their exact nature!
My friend got upgraded to a junior suite, with a huge balcony. You may be lucky too, so give Royal Plaza a try!
This review is the subjective opinion of a TripAdvisor member and not of TripAdvisor LLC.