Just got back from my 3rd trip to Ibiza and would recommend the Roca Hostal above any of the other places I have stayed at previously.
Although there are no amenities such as swimming pool, shops or restaurant, everything you would need (including the beach) is within a 2 minute walk. Electronic Safe and Air Con are included although there is no fridge or balcony.
The staff are all very friendly and helpful, with somebody watching the front 24/7. Rooms are cleaned every day except Sunday, with fresh towels and even bedding supplied if requested.
There is definitely an overall friendly atmosphere to the place, as seems to be the case all over the White Isle.
Although there is some noise from nearby bars and returning clubbers until around 6am, it is a LOT easier to sleep here than other places I have stayed. The staff tolerate NO excess noise at daft hours and so if you're looking to sleep from early morning until around lunchtime (why would you want any more than this in Ibiza?!) then you shouldn't be disappointed!
This review is the subjective opinion of a TripAdvisor member and not of TripAdvisor LLC