Without doubt this is the best hostel I have ever stayed at; I originally planned to stay two days, and ended up staying three weeks. Travelling solo, on arrival Sergio immediately put a beer in my hand and introduced me to a bunch of travellers sitting in the courtyard. The atmosphere is always relaxed and friendly, Sergio is both hilarious and extremely helpful, all staff are excellent at their jobs, and there is always free tea, coffee, and corn chips and offer.
One of the most impressive things about the place is that while it has a strong social atmosphere, it is also always possible to get a good night's sleep. This is because, while the 10pm 'quiet' policy is enforced, Sergio always makes sure that anyone who wants to have a good time is directed to a nearby bar or dancefloor, generally accompanied by Sergio himself.
If I ever return to Antigua, I would not think of staying anywhere else.