I stayed at Ushuaia from 9/11 - 9/18 since the resort is host to several DJ-ed parties during the week. However, the rooms leave much to be desired.
1. The shower drain was slow when I first arrived. So I called maintenance, who simply took the metal filter off the drain to provide slightly more flow. As a result, I needed to request extra towels from the Cleaning Crew each morning to soak up all the water off the bathroom floor until it could be mopped the next day after I'd used the shower prior to going out in the evening.
2. None of the electronics worked in the room except for the Wifi Bose System (luckily)
3. After I checked out of the hotel, taxi-ed to the airport, and made it half way back to the US, the resort fraudulently charged me 150 euros for a liquor bottle that was "missing." NO ONE at this hotel drinks from the mini-bar, as several liquor stores are only steps away from the resort for cheaper bottles. We ALL purchased our liquor from supermarkets, and even the receptionists advise you to do so during check-in. Yet, after I'm long gone, they accuse me of drinking one of their overly-priced liquor bottles w/o giving me the opportunity to prove my innocence while on the premise. Reaching out to them about this matter solved nothing as they only provided a terse, cold reply.
I will definitely return to Ibiza during summers in the future, but I will caution all friends and business partners against staying at Ushuaia.