This isn't the nicest hostel, but it's not the worst. The pictures on their website and here are not really accurate because in person the facilities are not very nice. It has bar/pub level cleanliness all around. The staff acts like they can't be bothered to talk to you and all hop between being bartenders and concierges. Ech....
Barnacles is a great place, but it is REALLY expensive. But everything is Galway is expensive, in my opinion more expensive than Dublin.
My favorite hostel I have ever been to. The staff are exceptional, everything is always spotless, and everyone who stays here is ready to have a good time. BEST HOSTEL EVER!
Isaacs is awesome. The staff is super friendly and helpful, everything is really clean, and I cannot recommend the pub crawl enough. My only complaint is that the lockers are in the basement, which means 1. it makes all your stuff stink if and 2. you have to run up and down stairs to get your stuff.