I really enjoyed my time at Holistico. The staff were welcoming, extremely friendly and very helpful when booking tours/shuttle buses. My friends and I booked our pacaya volcano tour through the hostel and we had a really good guide.
They offer delicious free breakfast (try the pesto egg sandwich) and free snacks, tea, coffee and juice daily which is excellent. You also have access to their kitchen.
The 6 bed dorm my friends and I shared was basic and relatively small; my bed was a little squeeky but otherwise fine. The rooms don't lock but you can keep all your valuables in a locker near reception. The hostel is also locked by a gate at all times so you feel very secure.
They offer cheap laundry services (10q per kilo) and you can hire a towel for 10q. The showers were hot and had good water pressure. There's wifi in the main reception area. We enjoyed a few drinks on the relaxing terrace. The hostel is pretty quiet during the day and there's no bar but you can buy beers - they have 2 for 10q during happy hour. You can also drink your own drinks in there. Outsiders are not allowed into the hostel so if you have friends staying elsewhere they won't be allowed in.
Overall, the hostel was very relaxing, clean and secure with helpful, friendly staff. If you want to party you can walk down the road to bars and other party hostels. Antigua is very small so you can easily walk around the town and go to restaurants and supermarkets from the hostel.
I'd definitely recommend you stay here! Thanks for a great stay!