We stayed (8 of us college students) at The Arenal Backpackers Hostel. It was incredible. Rooms and bathrooms were clean. computer lab, restaurant and bar on sight. Pool was clean and there was a clear view of the volcano from our hostel. Staff spoke great English and it was just a great experience over all. We were about a two minute walk from banks, shops, grocery stores, restaurants and tour guides! Also, this hostel and town in general is VERY family friendly. Not just for us traveling college kids!