We had a great short stay at Gaslamp Hostel. Its unassuming door nestled between two busy restaurants led up to a quirky and cozy space, almost like something out of Encanto the Disney movie. Everything was as described: great location, communal space, shared toilets.
Staff was friendly and helpful. They let us store our luggage as we arrived early and headed out immediately after.
That said, do manage your expectations. The place is a hostel so don't expect concierge or porter service. No lift, lots of stairs so prepare to exercise when you check in and out.