Stayed here for 5 nights in a double ensuite room. first night stayed in one of the apartments around the corner from the hostel which was bigger and would recommend this if available to you. Also it was quieter than staying in the hostel building. Overall, the 5 day stay (during bank holiday weekend) was fairly quiet in terms of noise from other guests, although I was on the top floor and has less rooms on it . The staff are friendly and informative. Recommend booking the Galway Tour Company direct from the hostel (10% discount) to spend the day touring the Cliffs of Mohar or Connemarra - although check the weather forcast the day before as can be unpredictable as always in Ireland. I did the 1 hour bus tour guide around the city which I recommend too and only 10euros, this will give you a good feel of the city.

Free internet available, no breakfast but did not expect it but you can buy your own food and prepare food in the kitchen area.
The hostel is only 5 min walk from the main square, coach station and Quay st where all the pubs are.

You must go to a pub called Monroes which is across the Wolfe Tone bridge down by the Spanish Arch. They have the best pizza I have tasted in a long time. They do great music sessions too each night. For a traditional old irish pub feel/decor you should go to Tigh Neachtain’s which is on Quay street. Another one is called Tig Cóilí which is on the same road.

Good location, car parking as per previous review - 2 blocks away, but suitable enough. Shared a four bed room with my family - ensuite. Push button timed shower - not a problem as such, but annoying if you want to wash your hair (soap in eyes)! Wireless interent available in some rooms, but also computer room and common room. 3pm check is inconvenient if you have arrived earlier - but not a huge issue.
BREAKFAST.
A continental breakfast, light or otherwise is NOT bread and juice (with tea and coffee). No cereal even, let alone anything else continental! If you don't or can't eat jam, it's bed and butter! Only 2 toasters for the whole hostel, and then you must wash up your own breakfast plate. Not exactly hygienic!
Perhaps not a problem for some, but when you book an ensuite room with breakfast included, a little more than bread is expected!! Try the local hotels/B+Bs.

This is a bustling hostel in the busy section of the city. Around the corner from Sleepzone are a couple blocks of apartments populated by mostly young people. Which translates into noisy partying at night. Fortunatly they knocked off by midnight, which was a blessing. The hostel itself was as quiet as you could expect from a busy place.
Parking is on the street or at a Car Park several blocks away- so that's a hassle. In all it was a nice place. Efficiently run. The staff was friendly and helpful. The biggest hassle was the laundry. There is only one washer & drier for guests, of which there are many. So it takes a very long time to do laundry. As a possible plus you get to meet and spend a lot of time with your fellow guests, as you watch over your wash.
For a Hostel in a big city I would say it rates pretty high. The attendant hassles are the property of so many people using the place.

We stayed in a private double with a shared bathroom in June. For the price, it was pretty good - clean, big room, helpful staff. The only downside was that it was VERY easy to hear other travelers from inside our room (you could hear every footstep on the above floor) Location was pretty good. Breakfast was toast and jam... and that's it. I suggest skipping the toast and getting an Irish breakfast elsewhere.